Definition of "rugae" []

• Plural form of ruga. (noun)

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• "In adulthood the vagina is able to stretch in all directions thanks to elastic fibers and small wrinkles in the surface, called rugae."
• "When estrogen levels remain low, the rugae flatten and may disappear altogether."
• "A bisection of the organ laid bare the rugae, gastric folds within the lining, the keys igniting the digestive process."