adminicular
/ˌad.mɪˈnɪkjʊ.lər/Definitions
1. adjective
relating to the collarbone or the shoulder
“The adminicular region is particularly vulnerable to injury during sports activities.”
2. noun
the part of the skeleton that includes the clavicle, scapula, and sternum
“The adminicular skeleton is a key component of the human skeletal system.”