Definition of triquetral in US English:


(also triquetral bone)


  • A carpal bone on the outside of the wrist, articulating with the lunate, hamate, and pisiform bones.

    • ‘It comprises the carpal bones scaphoid, lunate, triquetral, trapezium, trapezoid, capitate and hamate.’
    • ‘In addition, some fibers join the trapezium and trapezoid with the scaphoid, others pass between the hamate and triquetral bones, and, finally, a separate band of the same ligament is joined to the pisiform bone.’
    • ‘A top surface of the platform supports portions of the third, fourth, and fifth metacarpal bones of the hand and the hanate, pisiform, and triquetral bones of the wrist.’
    • ‘Plain radiographs revealed the presence of synostosis of the lunate and triquetral bones of the injured wrist.’
    • ‘Elias fractured the radius and scaphoid of his left wrist and ruptured the ligaments that link the triquetral bone and the radius.’


Mid 17th century: from Latin triquetrus ‘three-cornered’ + -al.