corrugation

Meanings

1. 1
   noun

   the process or state of forming a surface into parallel ridges and grooves

   Corrugation makes a thin sheet of metal much more resistant to bending.

2. 2
   noun

   a ridge, groove, wrinkle, or fold on a corrugated surface

   Each corrugation in the cardboard helped protect the package from crushing.

From Medieval Latin corrugatio, 'a wrinkling,' from Latin corrugare, 'to wrinkle,' formed from com-, an intensifier, + ruga, 'wrinkle.' The word applies both to the process of making alternating ridges and to an individual ridge or fold.

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