Answer: rugae

AnswerCrossword Clue
RUGAEFolds.
RUGAEFolds: Nat. Hist.
RUGAEFolds, in botany.
RUGAEWrinkles, in zoology.
RUGAEWrinkles, in botany.
RUGAEWrinkles
RUGAEWrinkles, to botanists
RUGAEWrinkles on Cato's brow
rugaewrinkle, fold, or ridge
rugaeRUGA, an anatomical fold or wrinkle