The Collaborative International Dictionary of English v.0.48:
collarbone \collarbone\, Collar bone \Col"lar bone`\ (Anat.) The clavicle, a bone linking the scapula and sternum. [1913 Webster + WordNet 1.5]WordNet (r) 3.0 (2006):
collarbone n 1: bone linking the scapula and sternum [syn: clavicle, collarbone]