tail fin

n 1: a stabilizer that is part of the vertical tail structure of

an airplane [syn: {vertical stabilizer}, {vertical fin},

{tailfin}]

2: one of a pair of decorative projections on the rear fenders

of an automobile [syn: {tailfin}, {fin}]

3: the tail of fishes and some other aquatic vertebrates [syn:

{caudal fin}]