triquetral

from WordNet (r) 3.0 (2006)

triquetral
    n 1: a wrist bone that articulates with the pisiform and hamate
         and lunate bones [syn: {triquetral}, {triquetral bone}, {os
         triquetrum}, {cuneiform bone}, {pyramidal bone}]

from The Collaborative International Dictionary of English v.0.48

Triquetral \Tri*que"tral\, a.
   Triquetrous.
   [1913 Webster]