What is the meaning of Corrugator?

(n.) A muscle which contracts the skin of the forehead into wrinkles.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). corrugator. Retrieved September 21, 2026, from http://smartdefine.org/corrugator/definitions/1991893
ChicagoWebster's. 2011. "corrugator" http://smartdefine.org/corrugator/definitions/1991893 (accessed September 21, 2026).
HarvardWebster's 2011, corrugator, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/corrugator/definitions/1991893>.
MLAWebster's. "corrugator" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/corrugator/definitions/1991893>