1. process of the ulna that forms the outer bump of the elbow and fits into the fossa of the humerus when the arm is extended; [syn: olecranon, olecranon process]
WordNet (r) 3.0 (2006):
olecranon process
n 1: process of the ulna that forms the outer bump of the elbow
and fits into the fossa of the humerus when the arm is
extended [syn: olecranon, olecranon process]