plural noun
Pan·​to·​the·​ria | \ˌpantəˈthirēə\

Definition of Pantotheria 

: an order or other division of generalized mammals widespread during the Jurassic and commonly conceded to be ancestral to the marsupials and placental mammals

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!

Other Words from Pantotheria

pantotherian \ ¦⸗⸗¦thirēən \ adjective or noun

History and Etymology for Pantotheria

New Latin, from panto- + -theria

Keep scrolling for more

Learn More about Pantotheria

Share Pantotheria

Statistics for Pantotheria

Look-up Popularity

Comments on Pantotheria

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


playful or foolish behavior

Get Word of the Day daily email!

Test Your Vocabulary

Autumn Words of the Day 2018

  • a-top-down-image-of-road-through-an-autumn-forest
  • Which is a synonym of fugacious?
True or False

Test your knowledge - and maybe learn something along the way.

Word Winder's CrossWinder

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!