Age of Mammals

noun

: cenozoic

Word History

First Known Use

1852, in the meaning defined above

Time Traveler
The first known use of Age of Mammals was in 1852

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!

Dictionary Entries Near Age of Mammals

Cite this Entry

“Age of Mammals.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Age%20of%20Mammals. Accessed 7 Nov. 2024.

Kids Definition

Age of Mammals

: the Cenozoic era
Love words? Need even more definitions?

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