Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

tail fin

noun

Simple Definition of tail fin

  • : 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

Full Definition of tail fin

  1. 1 :  the terminal fin of a fish or cetacean

  2. 2 :  fin 2b

1681

First Known Use of tail fin

1681


Seen and Heard

What made you want to look up tail fin? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 10, 2016

to put in good humor

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image33683556

How much does a batman (the Turkish unit of measurement) weigh?

16.96 pounds 2.2 pounds 196.5 pounds 100 pounds
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ