from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any of various extinct herbivorous mammals of the group Edentata or Xenarthra of the Oligocene Epoch through the Holocene Epoch that inhabited South and North America. Some ground sloths, including megatherium, were very large.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun gigantic extinct terrestrial sloth-like mammal of the Pliocene and Pleistocene in America
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