TRAPEZIA
TRAPEZIUM
trapezium, trapezium bone, os trapezium
(noun) the wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpals
Trapezium
(noun) a multiple star in the constellation of Orion
trapezium
(noun) a quadrilateral with no parallel sides
Source: WordNet® 3.1
Noun
trapezia
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