sternocleido mastoideus(n = noun.body) musculus sternocleidomastoideus, sternocleidomastoid, sternocleidomastoid muscle - 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;
is a kind of skeletal muscle, striated muscle
is a part of cervix, neck