monochromator, instrument that supplies light of one colour or light within a narrow range of wavelengths. Unwanted wavelengths (colours) are blocked by filters (first used by Bernard Lyot in the 1930s) or bent away, as in the spectroheliograph. The monochromator is used to photograph the Sun and

Japanese art: Painting: Ink monochrome painting was also employed by Zen adepts as a form of participatory spiritual exercise. In addition to representations of personages or historic moments, real or legendary, associated with Zen, Zen painters also depicted subjects not obviously religious in theme. Bird-and-flower paintings were created and…

technology of photography: …used photographic process is the black-and-white negative–positive system (Figure 1). In the camera the lens projects an image of the scene being photographed onto a film coated with light-sensitive silver salts, such as silver bromide. A shutter built into the lens admits light reflected from the scene for a given…

leaf fish: …fish is applied specifically to Monocirrhus polyacanthus, a South American species that is known for its close resemblance in both appearance and swimming behaviour to a dead, drifting leaf. This species is about 7.5 cm (3 inches) long and is coloured a mottled brown; it has serrated dorsal and anal…

bryophyte: General features: …cm (2 inches; the liverwort Monoclea) to less than 1 mm (0.04 inch) in width and less than 1 mm in length (male plants of the liverwort Sphaerocarpos). The thallus is sometimes one cell layer thick through most of its width (e.g., the liverwort Metzgeria) but may be many cell…

bryophyte: Annotated classification: Order Monocleales Large thalli of mainly uniformly parenchymatous cells, reclining; thallus forked to irregularly branched; archegonia within a sleevelike chamber behind the lobe apex; antheridia in padlike receptacles in the same location on different thalli; sporangia elongate on a massive elongate seta, with long elaters and…

pyroxene: Crystal structure: …and monoclinic pyroxenes are called clinopyroxenes. The essential feature of all pyroxene structures is the linkage of the silicon-oxygen (SiO4) tetrahedrons by sharing two of the four corners to form continuous chains. The chains, which extend indefinitely parallel to the ccrystallographic axis, have the composition of (SiO3)n(Figure 1). A repeat…

sulfur: Allotropy: …S8 ring allotropes is the monoclinic or β-form, in which two of the axes of the crystal are perpendicular, but the third forms an oblique angle with the first two. There are still some uncertainties concerning its structure; this modification is stable from 96 °C to the melting point, 118.9…

monoclinic system, one of the structural categories to which crystalline solids can be assigned. Crystals in this system are referred to three axes of unequal lengths—say, a, b, and c—of which a is perpendicular to b and c, but b and c are not perpendicular to each other. If the atoms or atom

monoclonal antibody, antibody produced artificially through genetic engineering and related techniques. Production of monoclonal antibodies was one of the most important techniques of biotechnology to emerge during the last quarter of the 20th century. When activated by an antigen, a circulating B

dinosaur: American hunting expeditions: for Coelophysis and Monoclonius. Cope’s dinosaur explorations began in the eastern badlands of Montana, where he discovered Monoclonius in the Judith River Formation of the Late Cretaceous Epoch (100.5 million to 66 million years ago). Accompanying him there was a talented young assistant, Charles H. Sternberg. Later Sternberg…

fuselage: …of fuselage structures are the monocoque (i.e., kind of construction in which the outer skin bears a major part or all of the stresses) and semimonocoque. These structures provide better strength-to-weight ratios for the fuselage covering than the truss-type construction used in earlier planes.

clavichord, stringed keyboard musical instrument, developed from the medieval monochord. It flourished from about 1400 to 1800 and was revived in the 20th century. It is usually rectangular in shape, and its case and lid were usually highly decorated, painted, and inlaid. The right, or treble, end

monocotyledon, one of the two great groups of flowering plants, or angiosperms, the other being the eudicotyledons (eudicots). There are approximately 60,000 species of monocots, including the most economically important of all plant families, Poaceae (true grasses), and the largest of all plant

monocotyledon, one of the two great groups of flowering plants, or angiosperms, the other being the eudicotyledons (eudicots). There are approximately 60,000 species of monocots, including the most economically important of all plant families, Poaceae (true grasses), and the largest of all plant

monocotyledon, one of the two great groups of flowering plants, or angiosperms, the other being the eudicotyledons (eudicots). There are approximately 60,000 species of monocots, including the most economically important of all plant families, Poaceae (true grasses), and the largest of all plant

political system: Dictatorship: …government in the modern world, monocracy—a term that comprehends the rule of non-Western royal absolutists, of generals and strongmen in Latin America and Asia, of a number of leaders in postcolonial Africa, and of the totalitarian heads of communist states—still flourished. Indeed, the 20th century, which witnessed the careers of…

binoculars: …a single telescope, called a monocular, may be employed. It is essentially one-half of a pair of binoculars and usually incorporates prisms in the light path.

double vision: Monocular diplopia differs from binocular diplopia in that the double vision remains present when the nonaffected eye is covered. Monocular diplopia is due to abnormalities in the structure of the eyeball itself, most notably the lens and cornea. Treatment is directed at correcting the abnormality.

monoculture, in agriculture, the practice of growing a single crop on a given acreage. While monoculture crops are sometimes rotated year to year, continuous monoculture, or mono-cropping, in which the same crop is grown year after year, has become one of the dominant paradigms in modern industrial

blood: Blood cells: …occur in two varieties—granulocytes and monocytes—and ingest and break down microorganisms and foreign particles. The circulating blood functions as a conduit, bringing the various kinds of cells to the regions of the body in which they are needed: red cells to tissues requiring oxygen, platelets to sites of injury, lymphocytes…

blood disease: Leukemia: …the least common variety, acute monocytic leukemia, the immature cells appear to be precursors of the monocytes of the blood. Myelogenous and monocytic leukemia occur more commonly in adults and adolescents than in young children. In general, acute leukemia occurs in young persons, but no age group is exempt. The…

blood disease: Leukocytosis: Monocytosis, an increase in the number of monocytes in the blood, occurs in association with certain infectious processes, especially subacute bacterial endocarditis—inflammation of the lining of the heart—and malaria. Monocytosis also occurs when the bone marrow is recovering from a toxic injury.

Adolphe-Théodore Monod was a Reformed pastor and theologian, considered the foremost Protestant preacher in 19th-century France. Born into a Swiss bourgeois family that was noted for successive generations of ministers and preachers, Monod studied theology at Geneva from 1820 to 1824. Following a

Adolphe-Théodore Monod was a Reformed pastor and theologian, considered the foremost Protestant preacher in 19th-century France. Born into a Swiss bourgeois family that was noted for successive generations of ministers and preachers, Monod studied theology at Geneva from 1820 to 1824. Following a

Gabriel Monod was a historian who helped introduce German historical methodology to France. One of the most scholarly and stimulating teachers of history, he also greatly improved the seminar system. Monod studied at the universities of Göttingen and Berlin, where he was influenced by Georg Waitz,

Jacques Monod was a French biochemist who, with François Jacob, did much to elucidate how genes regulate cell metabolism by directing the biosynthesis of enzymes. The pair shared, along with André Lwoff, the Nobel Prize for Physiology or Medicine in 1965. In 1961 Jacob and Monod proposed the

Jacques Monod was a French biochemist who, with François Jacob, did much to elucidate how genes regulate cell metabolism by directing the biosynthesis of enzymes. The pair shared, along with André Lwoff, the Nobel Prize for Physiology or Medicine in 1965. In 1961 Jacob and Monod proposed the

Jacques Monod was a French biochemist who, with François Jacob, did much to elucidate how genes regulate cell metabolism by directing the biosynthesis of enzymes. The pair shared, along with André Lwoff, the Nobel Prize for Physiology or Medicine in 1965. In 1961 Jacob and Monod proposed the

fingerfish, any of the half dozen species of fishes in the family Monodactylidae (order Perciformes), found from the Atlantic coast of western Africa to the Indo-Pacific region and usually inhabiting inshore or estuarine waters. They are extremely compressed and deep-bodied and are often greater in

fingerfish: The moonfish, or mono (species Monodactylus argenteus), a popular aquarium fingerfish found from eastern Africa to Malaysia, attains lengths of 20 cm (8 inches) and has two black bands extending vertically down its head. The striped fingerfish (M. sebae), of western Africa, is also a popular aquarium fish.

short-tailed opossum, (genus Monodelphis), any of more than 20 species of small, mouse- and shrew-sized, insectivorous and carnivorous, terrestrial opossums (family Didelphidae, subfamily Didelphinae, tribe Marmosini). Total length varies from about 11 cm (4.5 inches) in the smaller species to over

short-tailed opossum: …few species are long-lived (a gray short-tailed opossum [Monodelphis domestica] lived 49 months in captivity); others live only long enough for the female to bear and wean a single litter (semelparous).

Immanuel Kant: Tutor and Privatdozent: Continet Monadologiam Physicam (1756; The Employment in Natural Philosophy of Metaphysics Combined with Geometry, of Which Sample I Contains the Physical Monadology)—also known as the Monodologia Physica—contrasted the Newtonian methods of thinking with those employed in the philosophy then prevailing in German universities. This was the philosophy of Gottfried…

narwhal, (Monodon monoceros), a small toothed whale found along coasts and in rivers throughout the Arctic. Males possess a long straight tusk that projects forward from above the mouth. Narwhals lack a dorsal fin, and in adults the flippers are turned upward at the tips. Their mottled gray bodies

cetacean: Annotated taxonomy: Family Monodontidae (narwhal and beluga) 2 species in 2 genera. Dorsal fin lacking. Neck vertebrae free. Flippers broad, rounded at tips. Teeth reduced to 8 or 10 in Delphinapterus (beluga); all teeth vestigial in Monodon (narwhal) except for 1 left tooth of male, which grows into…

monodrama, a drama acted or designed to be acted by a single person. A number of plays by Samuel Beckett, including Krapp’s Last Tape (first performed 1958) and Happy Days (1961), are monodramas. The term may also refer to a dramatic representation of what passes in an individual mind, as well as

monody, style of accompanied solo song consisting of a vocal line, which is frequently embellished, and simple, often expressive, harmonies. It arose about 1600, particularly in Italy, as a response to the contrapuntal style (based on the combination of simultaneous melodic lines) of 16th-century

hermaphroditism, the condition of having both male and female reproductive organs. Hermaphroditic plants—most flowering plants, or angiosperms—are called monoecious, or bisexual. Hermaphroditic animals—mostly invertebrates such as worms, bryozoans (moss animals), trematodes (flukes), snails, slugs,

Sergius I: …recognition for his theory of monoenergism (that though Christ had two natures, there was but one operation or energy) from Heraclius, who then ordered that doctrine propagated throughout the Byzantine Empire. Further support came about 633 from Cyrus, patriarch of Alexandria, Egypt. Though at first tolerated by Pope Honorius I…

monogamy, the custom that allows a person to be legally married to only one spouse at one time. Appearing in two general forms, monogamy may imply a lifelong contract between two individuals that may be broken only under penalty—as prevails in the Roman Catholic and Hindu prescriptions for

monogatari, Japanese works of fiction, especially those written from the Heian to the Muromachi periods (794–1573). Monogatari developed from the storytelling of women at court. During the Heian period (794–1185) men wrote in Chinese, and it was women who developed this form of Japanese prose. Some

flatworm: Development: …parasitic platyhelminths occurs in the Monogenea, which have no intermediate hosts. The majority of the Monogenea are ectoparasitic (externally parasitic) on fish. The eggs hatch in water. The larva, known as an oncomiracidium, is heavily ciliated (has actively moving hairlike projections) and bears numerous posterior hooks. It must attach to…

baking: Staling: Monoglycerides of fatty acids have been widely used as dough additives to retard staling in the finished loaf.

gulper: The members of one family, Monognathidae, have mouths of normal proportions, but the other gulpers (Eurypharyngidae and Saccopharyngidae) are noted for their enormous mouths. In the Eurypharyngidae, the mouth is longer than the body. In the Saccopharyngidae, it is somewhat smaller but still huge. Gulpers are soft-bodied fish with tapered…

history of film: The Hollywood studio system: …capitalized studios, such as Republic, Monogram, and Grand National, that produced cheap formulaic hour-long “B movies” for the second half of double bills. The double feature, an attraction introduced in the early 1930s to counter the Depression-era box-office slump, was the standard form of exhibition for about 15 years. The…

monogram, originally a cipher consisting of a single letter, later a design or mark consisting of two or more letters intertwined. The letters thus interlaced may be either all the letters of a name or the initial letters of the given names and surname of a person for use upon writing paper, seals,

John Gould: …Birds of Europe (1832–37) and Monograph of the Ramphastidae (Toucans) (1834) were so successful that the Goulds were able to spend two years (1838–40) in Australia, where they made a large collection of birds and mammals. The collection resulted in Gould’s most famous work, The Birds of Australia, 7 vol.…

Sarah Wambaugh: Wambaugh’s Monograph on Plebiscites, with a Collection of Official Documents (1920), first prepared for use at the Versailles Peace Conference of 1919, established its author as the leading authority in the field. From 1920 to 1921, while studying at the London University School of Economics and…

Monograptus, extinct genus of graptolites (small aquatic colonial animals related to primitive chordates) found as fossils in Silurian marine rocks (formed about 444 million to 416 million years ago). The most common Silurian graptolite genus, Monograptus is characterized by a single branch, or

Pridoli Series: …occurrence of the graptolite species Monograptus parultimus in rock exposures at the entrance to the Pozary Quarries, which lie about 1.5 km (about 1 mile) east of Reporyje, outside of southwestern Prague. The M. parultimus biozone, in short, constitutes the global stratotype section and point (GSSP) for the base of…

Silurian Period: Silurian-Devonian boundary: …fixing the base of the Monograptus uniformis biozone (a single graptolite taxon but reinforced by associated conodont and trilobite taxa) as the base of the Devonian System. The top of the Silurian System is constrained by this golden spike, which has its stratotype at a designated horizon in a cliff…

carbolic acid, simplest member of the phenol family of organic compounds. See

polytheism: The nature of polytheism: The term monolatry has a connected but different sense; it refers to the worship of one god as supreme and sole object of the worship of a group while not denying the existence of deities belonging to other groups. The term henotheism is also used to cover…

megalith, huge, often undressed stone used in various types of Neolithic (New Stone Age) and Early Bronze Age monuments. Although some aspects of the spread and development of megalithic monuments are still under debate, in Spain, Portugal, and the Mediterranean coast the most ancient of the

African architecture: Influences of Islam and Christianity: …the exception of the remarkable rock churches of Lalībela, Ethiopia. Following the Islamization of Egypt, the Ethiopian church was isolated for many centuries, but, during the reign of the ascetic Zagwe king Lalībela in the 13th century, 11 churches were carved out of the red tufa, including the cruciform church…

monolithic filter, a complete frequency-selective filter constructed on a single piezoelectric crystal plate. A piezoelectric crystal is one in which a physical deformation or movement takes place when a voltage is applied to its surfaces. A series of six properly spaced platings (electrodes) on a

integrated circuit: Monolithic microwave ICs: A special type of RFIC is known as a monolithic microwave IC (MMIC; also called microwave monolithic IC). These circuits usually run in the 2- to 100-GHz range, or microwave frequencies, and are used in radar systems, in satellite communications, and as…

Friedrich Schleiermacher: Early career: The Monologen (1800; Soliloquies), written in a somewhat artificial rhythmic prose, presented a parallel to religion in the view of ethics as the intuition and action of the self in its individuality. The individuality of each human being is here seen as a unique “organ and symbol” of…

St. Anselm of Canterbury: Early life and career: …(1077), Anselm had written the Monologion (“Monologue”) at the request of some of his fellow monks. A theological treatise, the Monologion was both apologetic and religious in intent. It attempted to demonstrate the existence and attributes of God by an appeal to reason alone rather than by the customary appeal…

monologue, in literature and drama, an extended speech by one person. The term has several closely related meanings. A dramatic monologue (q.v.) is any speech of some duration addressed by a character to a second person. A soliloquy (q.v.) is a type of monologue in which a character directly

Monomakh’s Cap, oldest of the Russian crowns kept in the Kremlin, Moscow. It is a gold skullcap composed of eight sectors elaborately ornamented with a scrolled overlay of gold filigree and bordered with fur. The cap appears to be Oriental work of the late 13th or early 14th century, but in the

Vladimir II Monomakh was the grand prince of Kiev from 1113 to 1125. Vladimir was the son of Grand Prince Vsevolod I Yaroslavich (ruled Kiev 1078–93) and Irina, the daughter of the Byzantine emperor Constantine IX Monomachus. He became active in the politics of Kievan Rus, helping his father and

Noh theatre: …Noh, which Zeami described as monomane, or the “imitation of things.” He advised on the selection of properly classical characters to be portrayed, from legend or life, and on the proper integration of the visual, the melodic, and the verbal to open the eye and ear of the mind to…

monomer, a molecule of any of a class of compounds, mostly organic, that can react with other molecules to form very large molecules, or polymers. The essential feature of a monomer is polyfunctionality, the capacity to form chemical bonds to at least two other monomer molecules. Bifunctional

money: Standards of value: …bimetallic standard degenerated into a monometallic standard. If, for example, the quantity of silver designated as the monetary equivalent of 1 ounce of gold (15 to 1) was less than the quantity that could be purchased in the market for 1 ounce of gold (say 16 to 1), no one…

monometer, a rare form of verse in which each line consists of a single metrical unit (a foot or dipody). The best-known example of an entire poem in monometer is Robert Herrick’s “Upon His Departure Hence”: Another example in light verse is Desmond Skirrow’s “Ode on a Grecian Urn

inland water ecosystem: Permanent bodies of standing fresh water: Other thermal patterns are monomixis, in which a single annual period of circulation alternates with a single thermal stratification event, and polymixis, in which frequent periods of stratification occur.

homomorphism: … to H is called a monomorphism, and a homomorphism that is “onto,” or covers every element of H, is called an epimorphism. An especially important homomorphism is an isomorphism, in which the homomorphism from G to H is both one-to-one and onto. In this last case, G and H are…

Mwene Matapa, title borne by a line of kings ruling a southeast African territory between the Zambezi and Limpopo rivers, in what is now Zimbabwe and Mozambique, from the 14th to the 17th century. Their domain was often called the empire of the Mwene Matapa, or simply Matapa (or Mutapa), and is

bivalve: Internal features: …creates what is called the monomyarian condition. In bivalves with such a configuration, the anterior shell and mantle are confined to a small area; the foot, where present, is always greatly reduced and positioned anteriorly. The visceral mass and organs of the mantle cavity are arranged around the central posterior…

neuritis: …can affect one nerve (mononeuritis) or a plexus of nerves (plexitis). When several single nerves are affected simultaneously, the condition may be referred to as mononeuritis multiplex. When widely separated nerves are affected, it is known as polyneuritis. The symptoms of neuritis are usually confined to a specific portion…

neuritis: …may be referred to as mononeuritis multiplex. When widely separated nerves are affected, it is known as polyneuritis. The symptoms of neuritis are usually confined to a specific portion of the body served by the inflamed nerve or nerves.

Monongah mining disaster of 1907, deadly mining explosion on Dec. 6, 1907, in Monongah, W.Va., that killed more than 350 miners. The West Virginia coal mine that was the site of the disaster had an extensive maze of underground tunnels. About 10:00 am on December 6, an underground explosion

West Virginia: Agriculture and forestry: Monongahela National Forest, in the highland region, is one of the largest in the eastern United States. Wisely used, this renewable resource is a safeguard against floods, slope erosion, and air pollution. It is significant to the state’s tourist sector, to the thousands of workers…

Monongahela River, river formed by the confluence of the Tygart and West Fork rivers in Marion county, West Virginia, U.S. It flows 128 miles (206 km) in a northerly direction past Morgantown into Pennsylvania, past Brownsville and Charleroi, joining the Allegheny River at Pittsburgh to become a

Monongahela Series, division of Pennsylvanian rocks in the eastern and southeastern United States. (The Pennsylvanian Subperiod began about 318 million years ago and lasted about 19 million years.) It was named for exposures studied along the Monongahela River in Pennsylvania and is also recognized

Battle of the Monongahela, (July 9, 1755), in the last French and Indian War, thorough defeat of General Edward Braddock’s British army by a smaller force of French and Indians of several tribes led by Captain Daniel de Beaujeu and, after his death, by Captain Jean Dumas. After a slow march from

Japanese art: Asuka period: …of which were the Soga, Mononobe, and Nakatomi. Each of the clans was tied to the imperial line by providing wives for the emperors. They also provided increasingly specialized hereditary services to the court; for example, the Mononobe were warriors, the Soga tax administrators, and the Nakatomi masters of religious…

animation: Contemporary developments: …anime such as Miyazaki Hayao’s Princess Mononoke (1997) are the modern equivalent of the epic folk adventures once filmed by Mizoguchi Kenji (The 47 Ronin, 1941) and Kurosawa Akira (Yojimbo, 1961; “The Bodyguard”). Kon Satoshi’s Perfect Blue (1997) suggests the early Japanese New Wave films of director Oshima Nagisa with…

coordination compound: Mononuclear, monodentate: The simplest types of coordination compounds are those containing a single metal atom or ion (mononuclear compounds) surrounded by monodentate ligands. Most of the coordination compounds already cited belong to this class. Among the ligands forming such complexes are a wide variety of…

mononuclear phagocyte system, class of cells that occur in widely separated parts of the human body and that have in common the property of phagocytosis, whereby the cells engulf and destroy bacteria, viruses, and other foreign substances and ingest worn-out or abnormal body cells. German

mononucleosis, infection in humans, caused by the Epstein-Barr virus (EBV), whose most common symptoms are fever, general malaise, and sore throat. The disease occurs predominantly in persons from 10 to 35 years old, but it is known to appear at any age. Infection of young children by the EBV

metabolism: Mononucleotides: Most organisms can synthesize the purine and pyrimidine nucleotides that serve as the building blocks of RNA (containing nucleotides in which the pentose sugar is ribose, called ribonucleotides) and DNA (containing nucleotides in which the pentose sugar is deoxyribose, called

motion-picture technology: Introduction of colour: In 1941 Monopack Technicolor was introduced. This was a three-layer film from which separation negatives were made for the Technicolor dye-transfer printing process.

sleep: Developmental patterns of sleep and wakefulness: The trend toward monophasic sleep probably reflects some blend of the effects of maturing and of pressures from a culture geared to daytime activity and nocturnal rest. In many Western cultures, monophasic sleep may become disrupted, particularly during adolescence and young adulthood. During those stages of life, sleep…

African music: Monophonic systems: These tonal systems, based on octaves, fifths, and fourths (i.e., on the simple ratios 1:2, 2:3, and 3:4), are found in the western Sudanic belt. There are also many pentatonic systems of this kind in the Sahel zone and on the Guinea Coast…

monophony, musical texture made up of a single unaccompanied melodic line. It is a basic element of virtually all musical cultures. Byzantine and Gregorian chants (the music of the medieval Eastern and Western churches, respectively) constitute the oldest written examples of monophonic repertory.

phosphide: …greater than one, and (3) monophosphides, in which the metal-to-phosphorus ratio is exactly one. Phosphorus-rich phosphides tend to have lower thermal stabilities and lower melting points than phosphides of the other two categories. Examples of these compounds are phosphides formed with the later transition metals (e.g., RuP2, PdP3, and NiP3).

printing: First generation of phototypesetters: mechanical: …from the Linotype; and the Monophoto (1957), derived from the Monotype. Retaining the mechanical limitations of machines intended to shape lead, they could not achieve appreciably higher rates of performance. Photocomposition had to be rethought in functional terms. This approach was explored in Germany as early as the 1920s with…

vowel: …with so-called pure vowels, or monophthongs—i.e., unchanging, or steady-state, vowels. Though they are single speech sounds, diphthongs are usually represented, in a phonetic transcription of speech, by means of a pair of characters indicating the initial and final configurations of the vocal tract. Many of the vowel sounds in most…

phylogeny: Animal evolution: The monophyletic sequence suggests that four groups evolved from lower forms to higher: Ameria (unsegmented animals), which includes flatworms, cnidarians, ctenophores, and mollusks; Polymeria (segmented animals), which includes annelids and arthropods; Oligomeria (reduced segmentation), which includes insects and echinoderms; and

monophysite, in Christianity, one who believed that Jesus Christ’s nature remains altogether divine and not human even though he has taken on an earthly and human body with its cycle of birth, life, and death. Monophysitism asserted that the person of Jesus Christ has only one, divine nature rather

monoplacophoran, (class Tryblidia), any of a group of primitive marine mollusks characterized by a single, cap-shaped shell and bilateral symmetry. The term Tryblidia is preferred over Monoplacophoran and Galeroconcha, because both latter terms are taken to include several fossil groups of

monoplacophoran, (class Tryblidia), any of a group of primitive marine mollusks characterized by a single, cap-shaped shell and bilateral symmetry. The term Tryblidia is preferred over Monoplacophoran and Galeroconcha, because both latter terms are taken to include several fossil groups of

monoplane, type of aircraft with a single pair of wings. The monoplane design has been nearly universally adopted over multiplane configurations because airflow interference between adjacent wings reduces efficiency. The first monoplane was constructed by the Romanian inventor Trajan Vuia, who made

Monopleura, genus of extinct and unusual bivalves (clams) found as fossils dated to the Cretaceous Period (145.5 million to 65.5 million years ago) and representative of a group of aberrant clams known as the pachyodonts. The thick triangular shell in Monopleura is capped by a much smaller

angiosperm: Stems: Monopodial branching occurs when the terminal bud continues to grow as a central leader shoot and the lateral branches remain subordinate—e.g., beech trees (Fagus; Fagaceae). Sympodial branching occurs when the terminal bud ceases to grow (usually because a terminal flower has formed) and an axillary…

common law: Further growth of statute law: The Statute of Monopolies of 1623 confirmed that monopolies were contrary to common law but made exceptions for patentable inventions, and a statute of 1601 became the basis of the privileges enjoyed by charitable trusts. Additionally, the series of Poor Laws enacted in the late 16th…

monopolistic competition, market situation in which there may be many independent buyers and many independent sellers but competition is imperfect because of product differentiation, geographical fragmentation of the market, or some similar condition. The theory was developed almost simultaneously