os trapezium


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Related to os trapezium: Carpal bones, Greater multangular, Greater multangular bone

tra·pe·zi·um (bone)

the lateral (radial) bone in the distal row of the carpus; it articulates with the first and second metacarpals, scaphoid, and trapezoid bones.

os trapezium

See trapezium.

tra·pe·zi·um

, pl. trapezia, trapeziums (tră-pē'zē-ŭm, -ă, -ŭmz)
1. A four-sided geometric figure having no two sides parallel.
2. The lateral (radial) bone in the distal row of the carpus; it articulates with the first and second metacarpals, scaphoid, and trapezoid bones.
Synonym(s): os trapezium [TA] , greater multangular bone, os multangulum majus, trapezium bone.
[G. trapezion, a table or counter, a trapezium, dim. of trapeza, a table, fr. tra- (= tetra-), four, + pous (pod-), foot]