Megatherium

noun
Mega·​the·​ri·​um

Definition of Megatherium

: a genus (the type of the family Megatheriidae) of ground sloths found in the Pliocene and Pleistocene of America that are often of gigantic size and are related to the sloths and anteaters, the skull and dentition resembling those of the former and the vertebrae those of the latter

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 Megatherium

New Latin, from mega- + -therium

Keep scrolling for more

Learn More About Megatherium

Dictionary Entries Near Megatherium

megatherian

Megatherium

megatherm

See More Nearby Entries 

Statistics for Megatherium

Cite this Entry

“Megatherium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Megatherium. Accessed 18 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Love words? Need even more definitions?

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