Merriam-Webster Logo
SINCE 1828
Menu
×

Seymouriamorpha

plural noun Sey·mour·i·a·mor·pha

Definition of Seymouriamorpha

: an order of Permian Labyrinthodontia comprising generalized forms exhibiting a mixture of amphibian and reptilian characters and possibly on the ancestral line of the true reptiles

There's more!

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!
Already a subscriber? Log in.

Origin and Etymology of seymouriamorpha

New Latin, from Seymouria, genus of Permian Labyrinthodontia (probably from the name Seymour + New Latin -ia) + -morpha

Seen and Heard

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

show hide

Love words? Need even more definitions?

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

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