plural noun Al·lo·the·ria

Definition of Allotheria

  1. :  a subclass of Mammalia comprising small primitive forms extinct since the early Cenozoic, being usually considered coextensive with the Multituberculata but sometimes extended to include the Protodonta and Triconodonta

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.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of allotheria

New Latin, from all- + -theria

First Known Use: 1880

Seen and Heard

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


feeling or affected by lethargy

Get Word of the Day daily email!