Phrase guide

sternocleidomastoid muscle

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

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.

Definition source: English Wiktionary via Wiktextract

Topics: anatomy, medicine, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: sternomastoid muscle, sternomastoid

Antonyms: none provided

2

noun

Meaning 2

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

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: sternocleidomastoid, sternocleido mastoideus, musculus sternocleidomastoideus

Antonyms: none provided

Broader terms: skeletal muscle, striated muscle

History

Etymology

No etymology was provided for this word.

Across languages

Translations

7 source translations are retained for this English entry.

  • Chinese Mandarin: 胸鎖乳突肌 /胸锁乳突肌 (xiōngsuǒrǔtú jī) — muscle
  • Finnish: päännyökkääjälihas — muscle
  • Hungarian: fejbiccentő izom — muscle
  • Italian: muscolo sternocleidomastoideo — muscle
  • Polish: mięsień mostkowo-obojczykowo-sutkowy — muscle
  • Portuguese: músculo esternocleidomastóideo — muscle
  • Spanish: músculo esternocleidomastoideo — muscle