• synonyms


noun, plural ru·gae [roo-jee, -gee] /ˈru dʒi, -gi/.
  1. Usually rugae. Biology, Anatomy. a wrinkle, fold, or ridge.
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Origin of ruga

First recorded in 1765–75, ruga is from the Latin word rūga
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for rugae

Historical Examples of rugae

  • This section of the colon is lined with rugae precisely like those which are found in the caecum.

    The Cambridge Natural History, Vol X., Mammalia

    Frank Evers Beddard

British Dictionary definitions for rugae


noun plural -gae (-dʒiː)
  1. (usually plural) anatomy a fold, wrinkle, or crease
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Word Origin for ruga

C18: Latin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for rugae


plural of ruga (1775), from Latin ruga "a wrinkle in the face," from PIE *rug-, variant of *reue- (see rough (adj.)).

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Online Etymology Dictionary, © 2010 Douglas Harper

rugae in Medicine


n. pl. ru•gae (-gē′, -gī′)
  1. A fold, crease, or wrinkle, as in the lining of the stomach. Often used in the plural.
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Related formsrugate′ (-gāt′) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.