trapezium
n. வியனகம், இருசிறை இணைகோடுடைய நாற்கட்டம்.
Tra*pe"zi*um, n.; pl. E. Trapeziums, L. Trapezia. Etym: [NL., fr. Gr. Tetra-) + Foot.] 1. (Geom.) Defn: 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.