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