ri·ma \ˈrīmə\noun (pluralri·mae \-īˌmē\) Etymology: New Latin, from Latin, slit, fissure, crack — more at row 1.: a long narrow aperture : cleft, fissure 2.alsorima glot·ti·dis\-ˈgläd.ədə̇s\[rima glottidis, New Latin, literally, rima of the glottis]: the passage in the glottis between the true vocal cords • ri·mal\-īməl\adjective