olecranon

English Thesaurus

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 (noun.body)

hypernym	:	appendage, outgrowth, process,
definition	:	a natural prolongation or projection from a part of an organism either animal or plant (noun.body)

part meronym	:	elbow bone, ulna,
definition	:	the inner and longer of the two bones of the human forearm (noun.body)