ground sloth

(redirected from Rathymotheriidae)
Also found in: Thesaurus.

ground sloth

n.
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. Also called giant ground sloth.
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Noun1.ground sloth - gigantic extinct terrestrial sloth-like mammal of the Pliocene and Pleistocene in Americaground sloth - gigantic extinct terrestrial sloth-like mammal of the Pliocene and Pleistocene in America
megatherian, megatherian mammal, megatheriid - a large extinct ground sloth
genus Megatherium, Megatherium - type genus of the Megatheriidae