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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]
Articles of Confederation a document created in 1781 that served as a set of guidelines for governing the newly formed United States of America. The Articles of Confederation created a "firm league of friendship" among the thirteen original states and maintained the majority of power in states' hands. It was replaced by the U.S. Constitution in 1789.
articular of or relating to body joints.
articulate spoken in clear and distinct words or syllables. [10 definitions]
articulated lorry (chiefly British) a very large truck, consisting of a cab and freight-hauling trailer, that carries goods over long distances; tractor-trailer; semi.
articulation the act or process of articulating. [5 definitions]