R0340900 (ro͞o′gə)n.pl.ru·gae(-gē′, -gī′)Biology often rugas A fold, crease, or wrinkle, as in the lining of the stomach.[Latin rūga.]ru′gate′(-gāt′) adj.
ru•gate
(ˈru geɪt, -gɪt)
adj. wrinkled; rugose. [1840–50; < Latin rūgātus, past participle of rūgāre to become wrinkled. See ruga, -ate1] EncyclopediaSeerugoseMedicalSeeruga