单词	ruga
释义	ruga noun ru·​ga ˈrü-gə  plural rugae ˈrü-ˌgī  -ˌgē, -ˌjē : an anatomical fold or wrinkle (as of the gastric mucous membranes) —usually used in plural Word History Etymology New Latin, from Latin, wrinkle — more at corrugate First Known Use 1683, in the meaning defined above Medical Definition ruga noun ru·​ga ˈrü-gə  plural rugae -ˌgī  -ˌgē  -ˌjē  : an anatomical fold or wrinkle especially of the viscera —usually used in plural the rugae of an empty stomach
随便看	Orobanche orobathymetric Orochi orochis orochon Orocovis orocratic orogen orogene orogeneses orogenesis orogenetic orogenic orogenies orogeny orograph orographic orographic rain orographical orographies orography Orohippus orohydrographic orohydrographical orohydrography

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