Trapezium1. (n.) A plane figure bounded by four right lines, of which no two are parallel.
2. (n.) A bone of the carpus at the base of the first metacarpal, or thumb.
3. (n.) 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.
Thesaurus Entries
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