3 definitions found From The Collaborative International Dictionary of English v.0.48 [gcide]: Trapezium \Tra*pe"zi*um\, n.; pl. E. {Trapeziums}, L. {Trapezia}. [NL., fr. Gr. ? a little table, an irregular four-sided figure, dim. of ? a table, for ?; ? (see {Tetra-}) + ? foot, akin to ? foot; hence, originally, a table with four feet. See {Foot}.] 1. (Geom.) A plane figure bounded by four right lines, of which no two are parallel. [1913 Webster] 2. (Anat.) (a) A bone of the carpus at the base of the first metacarpal, or thumb. (b) A region on the ventral side of the brain, either just back of the pons Varolii, or, as in man, covered by the posterior extension of its transverse fibers. [1913 Webster] From WordNet (r) 2.0 [wn]: trapezium n 1: a quadrilateral with no parallel sides [ant: {parallelogram}] 2: a multiple star in the constellation of Orion [syn: {the Trapezium}] 3: the wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpals [syn: {trapezium bone}, {os trapezium}] [also: {trapezia} (pl)] From WordNet (r) 2.0 [wn]: trapezia See {trapezium}
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