‖n.; pl. Rugae [ L. ] (Nat. Hist.) A wrinkle; a fold; as, the rugae of the stomach. [ 1913 Webster ]
a. [ L. rugatus, p. p. of rugare to wrinkle, fr. ruga a wrinkle. ] Having alternate ridges and depressions; wrinkled. Dana. [ 1913 Webster ]
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