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Related to pisiform bone: triquetral bone
Etymology: L, pisa, pea, forma, form; AS, ban, bone
a small pea-shaped spheroidal carpal bone in the proximal row of carpal bones. It articulates with the triangular bone and is attached to the flexor retinaculum, the flexor carpi ulnaris, and the abductor digiti minimi.
pis·i·form bone(pis'i-fōrm bōn)
A small bone resembling a pea in size and shape, in the proximal row of the carpus, lying on the anterior surface of the triquetral, with which it articulates; it gives insertion to the tendon of the flexor carpi ulnaris muscle.