1. 一、肩部：第二章 六大关节骨骺发育判定年龄 Age estimation of the six joints epiphyses | 一、肩部 Articulatio humeri | 二、肘部 Articulatio cubiti

noun

1. a ball-and-socket joint between the head of the humerus and a cavity of the scapula

Synonym: shouldershoulder joint