Collarbone and collar bone redirect here. The eye abnormality is correctly spelled coloboma. This article uses some professional terms to describe relative positions and directions. See Anatomical terms of location for more detailed information. In human anatomy, the clavicle or collar bone is classified as a long bone that makes up part of the shoulder girdle (pectoral girdle). It receives its name from the Latin clavicula ("little key") because the bone rotates along its axis like a key when the shoulder is abducted. (This movement is palpable with the opposite hand). In some people, particularly females who may have less fat in this region, the location of the bone is clearly visible as it creates a bulge in the skin. Overview The clavicle is a doubly-curved short bone that connects the arm

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