Medical Dictionary
Main Entry:
su·pi·na·tor Pronunciation:
'sü-p&-"nAt-&r Function:
noun : a muscle that produces the motion of supination;
specifically : a deeply situated muscle of the forearm that arises in two layers from the lateral epicondyle of the humerus and adjacent parts of the ligaments and bones of the elbowand that passes over the head of the radius to insert into its neck and the lateral surface of its shaft
[soo-puh-ney-ter] 
pəˌneɪ