A small rounded carpal bone situated where the palm of the hand meets the outer edge of the wrist.
- ‘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.’
- ‘Passing through the cubital region, it descends to the pisiform region proximal to the palm and enters the palm.’
- ‘The slip is sometimes joined or replaced by a muscular fasciculus arising from, or in the neighborhood of, the pisiform bone.’
- ‘The motor branch to the hypothenar muscles separates from the main ulnar nerve just distal to the pisiform at the wrist.’
Mid 18th century: from modern Latin pisiformis pea-shaped from pisum pea + forma shape.