Something that causes wrinkling or folding, or has the quality of creating ridges and grooves.
From Latin 'corrugare' (to wrinkle together), combining 'cor-' (together) and 'rugare' (to wrinkle), from 'ruga' (wrinkle). The '-ant' suffix indicates a present participle or agent quality.
The word shares its root with 'ruga,' which is also the name for the wrinkles in your brain (cerebral rugae)—so corrugant literally describes the same process happening in cardboard and your cortex!
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