sternocleidomastoid muscle is a noun meaning "one of two thick muscles running from the sternum and clavicle to the mastoid and occipital bone; turns head obliquely to the opposite side; when acting together they flex the neck and extend the head". It carries one recorded sense.
one of two thick muscles running from the sternum and clavicle to the mastoid and occipital bone; turns head obliquely to the opposite side; when acting together they flex the neck and extend the head
Definitions, synonyms and semantic relations for sternocleidomastoid muscle come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.