anal fin

noun

the median, unpaired fin on the ventral margin between the anus and the caudal fin in fishes.

Words nearby anal fin

anal canal, anal character, anal column, anal duct, anal erotic, anal fin, anal fissure, anal fistula, anal intercourse, anal orifice, anal pecten

British Dictionary definitions for anal fin

anal fin

noun

a median ventral unpaired fin, situated between the anus and the tail fin in fishes, that helps to maintain stable equilibrium