| Noun | 1. | rima - a narrow elongated opening or fissure between two symmetrical parts orifice, porta, opening - an aperture or hole that opens into a bodily cavity; "the orifice into the aorta from the lower left chamber of the heart" mouth, oral cavity, oral fissure, rima oris - the opening through which food is taken in and vocalizations emerge; "he stuffed his mouth with candy" pudendal cleavage, pudendal cleft, pudendal slit, rima pudendi, rima vulvae, urogenital cleft, vulvar slit - the fissure between the labia majora glottis vera, rima glottidis, rima vocalis, true glottis - the space between the two true vocal folds false glottis, glottis spuria, rima respiratoria, rima vestibuli - the opening between the false vocal folds |