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corrugate

[verb kawr-uh-geyt, kor-; adjective kawr-uh-git, -geyt, kor-]
verb (used with object), cor·ru·gat·ed, cor·ru·gat·ing.
  1. to draw or bend into folds or alternate furrows and ridges.
  2. to wrinkle, as the skin or face.
  3. Western U.S. to make irrigation ditches in (a field).
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verb (used without object), cor·ru·gat·ed, cor·ru·gat·ing.
  1. to become corrugated; undergo corrugation.
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adjective
  1. corrugated; wrinkled; furrowed.
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Origin of corrugate

1375–1425; late Middle English < Latin corrūgātus past participle of corrūgāre, equivalent to cor- cor- + rūg(āre) to wrinkle + -ātus -ate1
Related formscor·ru·gat·ed, adjectivecor·ru·ga·tor, nounun·cor·ru·gat·ed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for corrugator

corrugator

noun
  1. a muscle whose contraction causes wrinkling of the brow
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corrugate

verb (ˈkɒrʊˌɡeɪt)
  1. (usually tr) to fold or be folded into alternate furrows and ridges
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adjective (ˈkɒrʊɡɪt, -ˌɡeɪt)
  1. folded into furrows and ridges; wrinkled
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Derived Formscorrugation, noun

Word Origin for corrugate

C18: from Latin corrūgāre, from rūga a wrinkle
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

Word Origin and History for corrugator

corrugate

v.

1620s; implied earlier as a past participle adjective (early 15c.), from Latin corrugatus, past participle of corrugare "to wrinkle very much," from com-, intensive prefix (see com-), + rugare "to wrinkle," of unknown origin.

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Online Etymology Dictionary, © 2010 Douglas Harper

corrugator in Medicine

corrugator

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