plural noun
The·​co·​don·​tia | \ ˌthēkəˈdänchə \

Definition of Thecodontia

: an order or Reptilia comprising various generalized diapsid Triassic forms presumably on the common ancestral line of the dinosaurs, crocodiles, and birds

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 Thecodontia

New Latin, from thec- + -odontia

Keep scrolling for more

Learn More About Thecodontia

Dictionary Entries Near Thecodontia



the cognoscenti

See More Nearby Entries 

Statistics for Thecodontia

Cite this Entry

“Thecodontia.” Dictionary, Merriam-Webster, Accessed 22 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon
Seen & Heard
People are talking about


Test Your Vocabulary

Dog Words Quiz

  • shiba puppy more or less demanding cuddles
  • Which of the following animals has a dog in its etymology?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Love words? Need even more definitions?

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