olecranon
noun [ C ] anatomy specialized uk/əʊˈlek.rə.nɒn/ us/oʊˈlek.rəˌnɑːn/ olecrana /əʊˈlek.rə.nə/ /oʊˈlek.rə.nə/
鹰嘴，肘突
the end part of the ulna (= a long thin bone in the lower arm) at the elbow
The olecranon forms the point of the elbow. 肘突是手肘的尖点。