inferior rectus muscle

Medical Dictionary

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

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