sternocleidomastoid

noun
ster·​no·​clei·​do·​mas·​toid | \ ˌstər-nə-ˌklī-də-ˈma-ˌstȯid How to pronounce sternocleidomastoid (audio) \
variants: or sternocleidomastoid muscle

Definition of sternocleidomastoid

: a thick superficial muscle on each side of the neck that 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 and occipital bone, and that acts especially to bend, rotate, flex, and extend the head

called also sternomastoid

First Known Use of sternocleidomastoid

1831, in the meaning defined above

History and Etymology for sternocleidomastoid

New Latin sternocleidomastoides, from stern- + cleid- + mastoides mastoid

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The first known use of sternocleidomastoid was in 1831

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Dictionary Entries Near sternocleidomastoid

sterno-

sternocleidomastoid

sternocostal

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Cite this Entry

“Sternocleidomastoid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sternocleidomastoid. Accessed 10 Aug. 2022.

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More Definitions for sternocleidomastoid

sternocleidomastoid

noun
ster·​no·​clei·​do·​mas·​toid | \ ˌstər-nō-ˌklīd-ə-ˈmas-ˌtȯid How to pronounce sternocleidomastoid (audio) \

Medical Definition of sternocleidomastoid

 (Entry 1 of 2)

: a thick superficial muscle on each side that 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 and occipital bone, and that acts especially to bend, rotate, flex, and extend the head

sternocleidomastoid

adjective

Medical Definition of sternocleidomastoid (Entry 2 of 2)

: of, relating to, supplying, or being a sternocleidomastoid the sternocleidomastoid artery

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