Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A large extinct ground sloth of the family Megatheriidae of the Miocene Epoch through the Pleistocene Epoch.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An extinct, gigantic, ground sloth (genus Megatherium) that flourished in South America during the Pleistocene epoch.

from the GNU version of the Collaborative International Dictionary of English

  • n. An extinct gigantic quaternary mammal, allied to the ant-eaters and sloths. Its remains are found in South America.

from The Century Dictionary and Cyclopedia

  • n. A mammal of the family Megatheriidæ.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. gigantic extinct terrestrial sloth-like mammal of the Pliocene and Pleistocene in America

Etymologies

From New Latin Megathērium, type genus : mega- + Greek thērion, wild beast; see treacle.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek mega ("large") + therion ("wild beast"). (Wiktionary)

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