trapezium

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

Trapezium \Tra*pe"zi*um\, noun; 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.

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.

From WordNet (r) 3.0 (2006) [wn]:

trapezium

noun

1: a quadrilateral with no parallel sides [ant: {parallelogram}]

2: a multiple star in the constellation of Orion

3: the wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpals [syn: {trapezium}, {trapezium bone}, {os trapezium}]


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