megatherium

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meg·a·the·ri·um

 (mĕg′ə-thîr′ē-əm)
n.
A large extinct ground sloth of the genus Megatherium of the Miocene Epoch through the Pleistocene Epoch.

[New Latin Megathērium, genus name : mega- + Greek thērion, wild beast; see treacle.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

meg·a·the·ri·um

(mĕg′ə-thîr′ē-əm)
A large, extinct ground sloth that lived from the Miocene through the Pleistocene Epochs, primarily in South America. It was as large as an elephant, had long curved claws, and ate plants.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.megatherium - type genus of the MegatheriidaeMegatherium - type genus of the Megatheriidae  
mammal genus - a genus of mammals
family Megatheriidae, Megatheriidae - extinct ground sloths
ground sloth, megathere - gigantic extinct terrestrial sloth-like mammal of the Pliocene and Pleistocene in America
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
Surely they were the weirdest, most destructive and wasteful megatheria in the whole history of mechanical invention.
In 1833 and 1835, Charles Darwin took trips to southern Argentina on the HMS Beagle and came across the first giant sloth fossils called Megatheria, according to a blog called (http://darwin200.christs.cam.ac.uk/pages/index.php?page_id=c3) Charles Darwin and Evolution .