diphy·cercal | \¦difē, -fə̇+\

Definition of diphycercal 

1 of a tail fin : having the upper and lower portions alike or nearly so and the vertebral column extending to the tip without any upturning in lungfish and crossopterygians this symmetry is attained by the evolution of a diphycercal tail— A. S. Romer

2 : having a diphycercal tail fin

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!

History and Etymology for diphycercal

diphy- + -cercal

Keep scrolling for more

Learn More about diphycercal

Share diphycercal

Statistics for diphycercal

Look-up Popularity

Comments on diphycercal

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


a state of commotion or excitement

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Dictionary Devil

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


Love words? Need even more definitions?

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