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depressor muscle of lower lip in Medicine

depressor muscle of lower lip

n.
  1. A muscle with origin from the lower border of the mandible, with insertion into the skin of the lower lip, with nerve supply from the facial nerve, and whose action depresses the lower lip.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.