TRAPEZIUMS

Noun

trapeziums

plural of trapezium

Source: Wiktionary

TRAPEZIUM

Tra*pe"zi*um, n.; pl. E. Trapeziums, L. Trapezia. Etym: [NL., fr. Gr. Tetra-) + Foot.]

1. (Geom.)

Definition: 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.

Source: Webster’s Unabridged Dictionary 1913 Edition