corrugantadj.
/ˈkɒr(j)uːɡənt/ Etymology: < Latin corrūgānt-em, present participle of corrūgāre to corrugate adj.
1706 (new ed.) Corrugant muscles.
1721 in N. Bailey
1755 in S. Johnson ; and in mod. Dicts.
This entry has not yet been fully updated (first published 1893; most recently modified version published online September 2018).