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innermost intercostal muscle in Medicine

innermost intercostal muscle

(ĭnər-mōst)
n.
  1. A layer of muscle parallel to the internal intercostal muscle but separated from it by the intercostal vessels and nerves.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.