| sternocleidomastoid | (n) 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, Syn. sternocleidomastoid muscle, musculus sternocleidomastoideus, sternocleido mastoideus |
| sternocleidomastoid vein | (n) drains the sternocleidomastoid muscle; empties into the internal jugular vein, Syn. vena sternocleidomastoidea |