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Definitions for: Trapezium [n] the wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpals
[n] a multiple star in the constellation of Orion
[n] (in US) a quadrilateral with no parallel sides
Webster (1913) Definition: 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.
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.
Synonyms: os trapezium, the Trapezium, trapezium bone
Antonyms: parallelogram
See Also: carpal, carpal bone, multiple star, quadrangle, quadrilateral, tetragon, wrist bone
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