sternocleidomastoidPronunciation: /ˌstəːnə(ʊ)ˌklʌɪdə(ʊ)ˈmastɔɪd/ (also sternocleidomastoid muscle)Definition of sternocleidomastoid noun Anatomy each of a pair of long muscles which connect the sternum, clavicle, and mastoid process of the temporal bone and serve to turn and nod the neck. sternocleidomastoid in other Oxford dictionaries Definition of sternocleidomastoid in the US English dictionary
