carina /kəˈɹiːnə/ noun6 •A longitudinal ridge or projection like the keel of a boat. •The keel of the glume of grasses. •The principal nerve of a sepal. •The keel of the breastbone of birds. •Any of several features that have a projecting central ridge. •Part of a papilionaceous flower consisting of two petals, commonly united, which encloses the organs of fructification. formscarinae · carinas
