Definition of pisiform in English:


(also pisiform bone)


  • A small rounded carpal bone situated where the palm of the hand meets the outer edge of the wrist and articulating with the triquetral.

    • ‘Passing through the cubital region, it descends to the pisiform region proximal to the palm and enters the palm.’
    • ‘The nerve recombined also beyond the tendon and was subject to compression, proximal to the pisiform bone.’
    • ‘The flexor carpi ulnaris inserts on the pisiform.’
    • ‘The motor branch to the hypothenar muscles separates from the main ulnar nerve just distal to the pisiform at the wrist.’
    • ‘The slip is sometimes joined or replaced by a muscular fasciculus arising from, or in the neighborhood of, the pisiform bone.’


Mid 18th century: from modern Latin pisiformis ‘pea-shaped’, from pisum ‘pea’ + forma ‘shape’.