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corrugator

/ (ˈkɒrʊˌɡeɪtə) /
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noun
a muscle whose contraction causes wrinkling of the brow
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for corrugator

corrugator
[ kôrə-gā′tər ]

n.
A muscle that draws the skin together, causing it to wrinkle.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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