A muscle that draws together the skin, causing it to wrinkle. [L. cor-rugo (conr-), pp. -atus, to wrinkle, fr. ruga, a wrinkle]
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cor·ru·ga·tor 'kȯr-ə-.gāt-ər n a muscle that contracts the skin into wrinkles esp one that draws the eyebrows together and wrinkles the brow in frowning
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cor·ru·ga·tor (corґə-ga″tər) [cor- + ruga] that which wrinkles; a muscle that wrinkles.Medical dictionary. 2011.