1. sternocleidomastoid - Noun
2. sternocleidomastoid - Adjective
(anatomy) Relating to or involving the sternum, the clavicle and the mastoid process of the temporal bone.
(anatomy) Of or pertaining to the sternocleidomastoid muscle.
sternocleidomastoid (plural sternocleidomastoids)
(anatomy) Ellipsis of sternocleidomastoid muscle.
The gland is covered anteriorly with infrahyoid muscles and laterally with the sternocleidomastoid muscle also known as sternomastoid muscle. Source: Internet
It can be felt between the anterior border of the sternocleidomastoid muscle, above the hyoid bone and lateral to the thyroid cartilage. Source: Internet
Breathing may be assisted by other muscles that can raise the ribs, such as sternocleidomastoid, pectoralis major and minor as well as the scalenes. Source: Internet