extra ocular muscle

ex·tra·oc·u·lar mus·cle

[ek-struh-ok-yuh-ler, ek-struh-]
noun Anatomy.

Origin:
1935–40; extra- + ocular

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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American Heritage
Medical Dictionary

extraocular muscle ex·tra·oc·u·lar muscle (ěk'strə-ŏk'yə-lər)
n.
Any of the six small muscles that control movement of the eyeball within the socket.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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00:10
Extra ocular muscle is always a great word to know.
So is callithumpian. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
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