cor·ru·ga·tion 
(kôr′ə-gāshən, kŏr′-)
(kôr′ə-gāshən, kŏr′-)n.
1.
a. The act or process of corrugating.
b. The state of being corrugated.
2. A groove or ridge on a corrugated surface.
- companionableness
- companionably
- companion animal
- companionate
- companionate marriage
- companion cell
- companion planting
- companionship
- companionway
- company
- company-grade officer
- company man
- company town
- company woman
- comparability
- comparable
- comparableness
- comparable worth
- comparably
- comparatist
- comparative
- comparatively
- comparative method
- comparator
- compare