tail fin

Noun (3)

1. a stabilizer that is part of the vertical tail structure of an airplaneSynonyms: vertical stabilizervertical stabiliservertical fintail fintailfin
2. one of a pair of decorations projecting above the rear fenders of an automobileSynonyms: tail fintailfinfin
3. the tail of fishes and some other aquatic vertebratesSynonyms: tail fincaudal fin