corrugation

[ kawr-uh-gey-shuh n, kor- ]
/ ˌkɔr əˈgeɪ ʃən, ˌkɒr- /

noun

the act or state of corrugating or of being corrugated.
a wrinkle; fold; furrow; ridge.

Origin of corrugation

1520–30; < Medieval Latin corrūgātiōn- (stem of corrūgātiō) a wrinkling. See corrugate, -ion
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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