Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

caudal fin

noun

Definition of caudal fin

: the terminal fin of a fish or cetacean located behind the caudal peduncle : tail fin — see fish illustration

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Learn More about caudal fin

Dictionary Entries near caudal fin

caud-

caudad

caudal

caudal fin

caudal peduncle

caudal vesicle

Caudata

Statistics for caudal fin

Look-up Popularity

Comments on caudal fin

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

Show Comments  Hide Comments 

WORD OF THE DAY

gritty

Listen to the pronounciation of gritty

showing courage and determination

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a closeup of a sunflower
  • Which of the following words means “of or relating to summer”?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Add Diction

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

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play
Ask the Editors
Word Games