sternocleidomastoid

Noun

1.

sternocleidomastoid - 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 Synonyms: musculus sternocleidomastoideus, sternocleido mastoideus, sternocleidomastoid muscle

cervix, musculus sternocleidomastoideus, neck, skeletal muscle, sternocleido mastoideus, sternocleidomastoid muscle, striated muscle