tail fin

noun

Definition of tail fin

1 :the terminal fin of a fish or cetacean
2 :fin 2b

First Known Use of tail fin

1681


TAIL FIN Defined for English Language Learners

tail fin

noun

Definition of tail fin for English Language Learners

  • : a fin at the back end of a fish, whale, etc.

  • : a decorative part on the back of a car that is shaped like a fish's fin


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