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sternocleidomastoid

[stur-noh-klahy-duh-mas-toid] /ˌstɜr noʊˌklaɪ dəˈmæs tɔɪd/
adjective
1.
of, pertaining to, or involving the sternum, the clavicle, and the mastoid process.
noun
2.
a thick muscle on each side of the neck, the action of which assists in bending the head and neck forward and sideways.
Origin
1820-1830
1820-30; sterno- + Greek kleido-, combining form of kleís key, clavicle + mastoid
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Word Origin and History for sternocleidomastoids

sternocleidomastoid

from sterno-, comb. form of Greek sternon or Latin sternum (see sternum) + Greek kleis (see clavicle) + mastoid.

Online Etymology Dictionary, © 2010 Douglas Harper
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sternocleidomastoids in Medicine

sternocleidomastoid ster·no·clei·do·mas·toid (stûr'nō-klī'də-mās'toid)
adj.
Relating to or characterizing the sternum, the clavicle, and the mastoid process. n.
The sternocleidomastoid muscle.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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