superior rectus muscle

Medical Dictionary

superior rectus muscle n.
A muscle with origin from the superior part of the common tendinous ring, with insertion into the superior part of the sclera of the eye, with nerve supply from the oculomotor nerve, and whose action directs the pupil upward and medialward.

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

noun
the ocular muscle whose contraction turns the eyeball upward and medially 
WordNet® 3.0, © 2006 by Princeton University.
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