triquetral bone
noun
tri·que·tral bone
| \ trī-ˈkwē-trel-
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Medical Definition of triquetral bone
: the bone in the proximal row of the carpus that is third counting from the thumb side of the wrist, has a pyramidal shape, and is situated between the lunate and pisiform bones
— called also triangular, triangular bone, triangularis, triquetral, triquetrum