sternocleidomastoid muscle

noun

A long thick superficial muscles on each side of the anterior neck which arises by one head from the first segment of the sternum and by a second from the inner part of the clavicle, that inserts into the mastoid process of the temporal bone and that acts especially to bend, flex, rotate and extend the head.

Similar
sternomastoid musclesternomastoidsternocleidomastoidsternocleido mastoideusmusculus sternocleidomastoideus

Meanings

nounsternocleidomastoid muscle (plural sternocleidomastoid muscles)

plural sternocleidomastoid muscles · alternative sternocleidomastoid · alternative sternocleidomastoideus

  1. anatomyA long thick superficial muscles on each side of the anterior neck which arises by one head from the first segment of the sternum and by a second from the inner part of the clavicle, that inserts into the mastoid process of the temporal bone and that acts especially to bend, flex, rotate and extend the head.

    Synonyms: sternomastoid muscle, sternomastoid

Synonyms & antonyms

nounA long thick superficial muscles on each side of the anterior neck which arises by one head from the first segment of the sternum and by a second from the inner part of the clavicle, that inserts into the mastoid process of the temporal bone and that acts especially to bend, flex, rotate and extend the head.

Similar
sternomastoid musclesternomastoid

More synonyms by meaning

nounone 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

Similar
sternocleidomastoidsternocleido mastoideusmusculus sternocleidomastoideus

Synonym sets from Open English WordNet, CC BY 4.0.

Translations

Chinese Mandarin 胸鎖乳突肌 /胸锁乳突肌
  • 胸鎖乳突肌 /胸锁乳突肌 (xiōngsuǒrǔtú jī)muscle
Finnish päännyökkääjälihas
  • päännyökkääjälihasmuscle
Hungarian fejbiccentő izom
  • fejbiccentő izommuscle
Italian muscolo sternocleidomastoideo
  • muscolo sternocleidomastoideomuscle
Polish mięsień mostkowo-obojczykowo-sutkowy
  • mięsień mostkowo-obojczykowo-sutkowymuscle
Portuguese músculo esternocleidomastóideo
  • músculo esternocleidomastóideomuscle
Spanish músculo esternocleidomastoideo
  • músculo esternocleidomastoideomuscle
Cite this entry
APA

sternocleidomastoid muscle. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/sternocleidomastoid%20muscle

MLA

“sternocleidomastoid muscle.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sternocleidomastoid%20muscle. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “sternocleidomastoid muscle,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/sternocleidomastoid%20muscle.

Source: sternocleidomastoid muscle on Wiktionary, CC BY-SA 4.0.