verb, -gat⋅ed, -gat⋅ing, adjective | 1. | to draw or bend into folds or alternate furrows and ridges. |
| 2. | to wrinkle, as the skin or face. |
| 3. | Western U.S. to make irrigation ditches in (a field). |
| 4. | to become corrugated; undergo corrugation. |
| 5. | corrugated; wrinkled; furrowed. |
corrugator cor·ru·ga·tor (kôr'ə-gā'tər)
n.
A muscle that draws the skin together, causing it to wrinkle.