(484-519), in Christian history, split between the patriarchate of Constantinople and the Roman See, caused by an edict by Byzantine patriarch Acacius that was deemed inadmissible by Pope Felix III.
the freedom of teachers and students to teach, study, and pursue knowledge and research without unreasonable interference or restriction from law, institutional regulations, or public pressure. Its basic elements include ...
in ancient Greece, the academy, or college, of philosophy in the northwestern outskirts of Athens, where Plato acquired property about 387 BC and used to teach. At the site there ...
a society of learned individuals organized to advance art, science, literature, music, or some other cultural or intellectual area of endeavour. From its original reference in Greek to the philosophical ...
any of several awards presented annually by the Academy of Motion Picture Arts and Sciences, located in Beverly Hills, California, U.S., to recognize achievement in the film industry. The award, ...
bay at the south end of Santa Cruz (Indefatigable) Island (one of the Galapagos Islands), about 600 miles (965 km) west of Ecuador, in the eastern Pacific Ocean. Named in ...
museum of art in Venice housing an unrivaled collection of paintings from the Venetian masters of the 13th through the 18th century. There are outstanding works by Giovanni Bellini, Giorgione, ...
museum of art in Florence chiefly famous for its several sculptures by Michelangelo, notably his "David." It also has a collection of 15th- and 16th-century paintings and many 13th-16th-century Tuscan ...
North American Atlantic seaboard possessions of France in the 17th and 18th centuries. Centred in what is now Nova Scotia, Acadia was probably intended to include the other present Maritime ...
national park on the Atlantic coast of Maine, U.S., astride Frenchman Bay. It has an area of 65 square miles (168 square km) and was originally established as Sieur de ...
a mountain-building event that affected the northern portion of the Appalachian Geosyncline from present-day New York to Newfoundland during the Devonian Period (408 to 360 million years ago). Orogenic activity ...
Pacific seaport, southwestern El Salvador. Spanish conquistadores defeated the Indians there in 1524, and it subsequently flourished as a colonial port. The old town has been rebuilt inland in order ...
city, southeastern Guanajuato estado ("state"), central Mexico. Acambaro lies along the Lerma River, in the central plateau, at 6,388 feet (1,947 m) above sea level. A Spanish settlement was founded ...
one of 18 families in the figwort order of flowering plants (Scrophulariales), containing approximately 250 genera and at least 2,500 species distributed predominantly in tropical and subtropical regions of the ...
in architecture and decorative arts, a stylized ornamental motif based on a characteristic Mediterranean plant with jagged leaves, Acanthus spinosus (for illustration, see order). It was first used by the ...
resort and port, Guerrero estado ("state"), southwestern Mexico. Situated on a deep, semicircular bay, Acapulco has the best harbour on the Pacific coast of Mexico and one of the finest ...
low range on the border of Brazil (Para state) and southern Guyana. The mountains, which rise to about 2,000 feet (600 m) above sea level, run in an east-west direction ...
subclass of the arthropod class Arachnida that includes the mites and ticks. The acarids may be separated into three orders, Opilioacariformes, Parasitiformes, and Acariformes, consisting of six suborders and about ...
city, northern Portuguesa estado ("state"), northwestern Venezuela. Formerly the state capital, Acarigua is a principal commercial centre of the northern portion of the Llanos (plains), in which cattle, sugarcane, cotton, ...
district of ancient Greece bounded by the Ionian Sea, the Ambracian Gulf, Mount Thyamus, and the Achelous River. Corinth founded several colonies on the coast of Acarnania in the 7th ...
rare hereditary metabolic disorder caused by lack of the organic catalyst or enzyme called catalase. Although a deficiency of catalase activity is noted in many tissues of the body, including ...
time rate at which a velocity is changing. Because velocity has both magnitude and direction, it is called a vector quantity; acceleration is also a vector quantity and must account ...
physiological changes that occur in the human body in motion as a result of rapid increase of speed. Rapid acceleration and surges in acceleration are felt more critically than are ...
in the rubber industry, any of numerous chemical substances that cause vulcanization (q.v.) of rubber to occur more rapidly or at lower temperatures. Many classes of compounds act as accelerators, ...
instrument that measures the rate at which the velocity of an object is changing (i.e., its acceleration). Acceleration cannot be measured directly. An accelerometer, therefore, measures the force exerted by ...
in prosody, a rhythmically significant stress on the syllables of a verse, usually at regular intervals. The word accent is often used interchangeably with stress, though some ...
in phonetics, that property of a syllable which makes it stand out in an utterance relative to its neighbouring syllables. The emphasis on the accented syllable relative to the unaccented ...
in music, momentary emphasis on a particular rhythmic or melodic detail; accent may be implied or specifically indicated, either graphically for example, >, -) or verbally (sforzato, abbreviated sfz). In ...
any of the 12 species of the bird genus Prunella, constituting the Old World family Prunellidae (order Passeriformes). They have thrushlike bills and rounded wings, and they frequently hop or ...
in prosody, a metrical system based only on the number of stresses or accented syllables in a line of verse. In accentual verse the total number of syllables in a ...
in prosody, the metrical system that is most commonly used in English poetry. It is based on both the number of stresses, or accents, and the number of syllables in ...
short-term credit instrument consisting of a written order requiring a buyer to pay a specified sum at a given date to the seller, signed by the buyer as an indication ...
company that performed commedia dell'arte (improvised popular Italian comedy) in the early 1600s. The name means "the stimulated." Leadership was provided by Tristano Martinelli (famous for his portrayal of Arlecchino, ...
in law, a person who becomes equally guilty in the crime of another by knowingly and voluntarily aiding the criminal prior to or after the crime. An accessory is one ...
any mineral in an igneous rock not essential to the naming of the rock. When it is present in small amounts, as is common, it is called a minor accessory. ...
any bird of the genus Accipiter, largest genus of the birds of prey, consisting of about 50 species of falconiform birds, or "bird" hawks, of the family Accipitridae. Sometimes accipiters ...
a form of irony in which a person feigns indifference to or pretends to refuse something he or she desires. The fox's dismissal of the grapes in Aesop's fable of ...
one of the greatest of the Roman tragic poets, in the view of his contemporaries. His plays (more than 40 titles are known, and about 700 lines survive) were mostly ...
any of the numerous gradual, long-term responses of an organism to changes in its environment. Such responses are more or less habitual and reversible should environmental conditions revert to an ...
in music, auxiliary part or parts of a composition designed to support the principal part or to throw it into relief. In secular medieval music and in much folk and ...
in law, a person who becomes equally guilty in the crime of another by knowingly and voluntarily aiding the other to commit the offense. An accomplice is either an accessory ...
Italian woman whose life story aroused a great deal of contemporary interest and was later the basis for a play by John Webster, The White Devil (1612), and for a ...
free-reed portable musical instrument, consisting of a treble casing with external piano-style keys or buttons and a bass casing (usually with buttons) attached to opposite sides of a hand-operated bellows.
any amount owed by a company as the result of a purchase of goods or services from another company on a credit basis. Under a trade-credit arrangement, the purchasing company, ...
systematic development and analysis of information about the economic affairs of an organization. This information may be used in a number of ways: by a firm's managers to help them ...
capital and largest city of Ghana, on the Gulf of Guinea (Atlantic Ocean). The city lies partly on a cliff, 25 to 40 feet (8 to 12 metres) high, and ...
the processes of change in artifacts, customs, and beliefs that result from the contact of societies with different cultural traditions. The term is also used to refer to the results ...
Italian legal scholar and leading jurist of the 13th century who was responsible for the renovation of Roman law. He was the last of a series of legal glossators (annotators) ...
in law, the rights and privileges of a person accused of a crime, guaranteeing him a fair trial. These rights were initially (generally from the 18th century on) confined primarily ...
American radio writer and performer and producer-writer for television, whose literate writing, wry humour, and relaxed style influenced numerous radio and television writers from the 1930s on.
semiautonomous province of Indonesia, forming the northern extremity of the island of Sumatra. Aceh is surrounded by water on three sides: the Indian Ocean to the west and north and ...
the maple family of flowering plants, in the order Sapindales, comprising about 200 species of trees and shrubs in two genera, Dipteronia (two species) of central and southern China, and ...
an open, saucer-shaped asexual fruiting body found in fungi (division Mycota). Always developed below the epidermis of the host tissue, it bears conidiophores (specialized filaments, or hyphae) that form conidia ...
in Greek mythology, legendary king of Segesta (Greek Egesta) in Sicily. His mother, Egesta, had been sent from Troy by her parents to save her from being devoured by a ...
genus of one-celled, umbrella-like green algae found in subtropical seas and sometimes called the "mermaid's wine glass." At the top of the tall, slender stalk, 0.5 to 10 cm (0.2 ...
an aldehyde used as a starting material in the synthesis of acetic acid, n-butyl alcohol, ethyl acetate, and other chemical compounds. It is manufactured by the oxidation of ethyl alcohol ...
drug used in the treatment of mild pain, such as headache and pain in joints and muscles, and to reduce fever. It is formed in the body as a metabolite ...
synthetic organic compound introduced in therapy in 1886 as a fever-reducing drug. Its effectiveness in relieving pain was discovered soon thereafter, and it was used as an alternative to aspirin ...
the most important of the carboxylic acids. A dilute solution of acetic acid produced by fermentation and oxidation of natural carbohydrates is called vinegar (q.v.); a salt, ester, or acylal ...
organic solvent of industrial and chemical significance, the simplest and most important of the aliphatic (fat-derived) ketones. Pure acetone is a colourless, somewhat aromatic, flammable, mobile liquid that boils at ...
(C6H5COCH3), an organic compound used as an ingredient in perfumes and as a chemical intermediate in the manufacture of pharmaceuticals, resins, flavouring agents, and a form of tear gas. It ...
(ACh), an ester of choline and acetic acid that is the transmitter substance at many neural, or nerve, synapses and at the motor end plate of vertebrate muscles (see end-plate ...
the simplest and best-known member of the hydrocarbon series containing one or more pairs of carbon atoms linked by triple bonds, called the acetylenic series, or alkynes. It is a ...
nomos (department) and historic region of Greece on the north coast of the Peloponnese, south of the Gulf of Corinth. In ancient times it was bounded on ...
any of the ancient Greek people, identified in Homer, along with the Danaoi and the Argeioi, as the Greeks who besieged Troy. Their area as described by Homer-the mainland and ...
3rd-century-BC confederation of the towns of Achaea in ancient Greece. The 12 Achaean cities of the northern Peloponnese had organized a league by the 4th century BC to protect themselves ...
eponymous ancestor of the Persian Achaemenid dynasty; he was the father of Teispes (Chishpish) and an ancestor of Cyrus II the Great and Darius I the Great. Although Achaemenes probably ...
(559-330 BC), ancient Iranian dynasty whose kings founded and ruled the Achaemenian Empire. Achaemenes (Persian Hakhamanish), the Achaemenians' eponymous ancestor, is presumed to have lived early in the 7th century ...
