Search Result for "artificial joint":
Wordnet 3.0

NOUN (1)

1. a metal or plastic part that is surgically implanted to replace a natural joint (possibly elbow or wrist but usually hip or knee); 



WordNet (r) 3.0 (2006):

artificial joint
    n 1: a metal or plastic part that is surgically implanted to
         replace a natural joint (possibly elbow or wrist but
         usually hip or knee)