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.’
    • ‘Plain radiographs revealed the presence of synostosis of the lunate and triquetral bones of the injured wrist.’
    • ‘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.’
    • ‘Elias fractured the radius and scaphoid of his left wrist and ruptured the ligaments that link the triquetral bone and the radius.’
    • ‘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.’


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