triquetral

 
Pronunciation: /trʌɪˈkwɛtr(ə)l/
(also triquetral bone)

noun

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

Origin:

mid 17th century: from Latin triquetrus 'three-cornered' + -al