corrugation

[kawr-uh-gey-shuhn, kor-]
noun
1.
the act or state of corrugating or of being corrugated.
2.
a wrinkle; fold; furrow; ridge.

Origin:
1520–30; < Medieval Latin corrūgātiōn- (stem of corrūgātiō) a wrinkling. See corrugate, -ion

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World English Dictionary
corrugate
 
vb
1.  (usually tr) to fold or be folded into alternate furrows and ridges
 
adj
2.  folded into furrows and ridges; wrinkled
 
[C18: from Latin corrūgāre, from rūga a wrinkle]
 
corru'gation
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

corrugation
1520s, from L. *corrugationem, from corrugare (see corrugate).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
These two types, which he terms surface roughness and surface corrugation, follow different laws of similarity.
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