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art. abbreviation of "article," in English grammar, the words "a," "an," and "the," which are used with nouns and act to limit the nouns' applications. (See "definite article," "indefinite article.")
art deco (sometimes cap.) a decorative style of the 1920s and 1930s that featured geometric shapes and bold colors and that was applied to furniture, glass and plastic ware, graphic productions, architecture, and the like.
artefact variant of artifact.
Artemis in Greek mythology, a goddess associated with the moon, virginity, and hunting; Diana.
arterial of, relating to, or similar to the arteries. [3 definitions]
arterialize to change (blood from the veins) into blood for the arteries through the addition of oxygen in the lungs.
arteriography examination of the arteries by x-ray after injection with a radiopaque dye.
arteriole a blood vessel located between an artery and a capillary.
arteriosclerosis a chronic disease of the arteries in which inelastic and thickened vessel walls reduce blood flow.
artery a vessel that carries blood away from the heart. (Cf. vein.) [2 definitions]
artesian well a well dug through impermeable strata, reaching water that is under pressure.
artful cunning or crafty. [3 definitions]
arthralgia pain in one or more of one's joints.
arthritis a disease of the joints in which they become painfully inflamed.
arthro- joint.
arthropod a class of invertebrates with hard, segmented bodies and jointed legs, including insects, spiders, crustaceans, and myriapods.
arthroscope an instrument in the shape of a fine tube that is used, in conjunction with fiber optics, for diagnosing and treating ailments of the joint.
arthroscopy examination of or minor surgery on a joint using an arthroscope.
Arthur in legend, esp. as codified by Thomas Malory in the sixteenth-century Morte d'Arthur, the King of Britain and the leader of the Knights of the Round Table.
artichoke a tall thistlelike plant whose flower head, composed of thick, leaflike scales, is cooked and eaten. [2 definitions]
article a single item or thing, esp. one of a class or group. [4 definitions]