any of an extinct genus (Megatherium) of very large, plant-eating, ground-dwelling sloths
Origin of megatheriumModern Latin from Classical Greek megas (see mega-) + th?rion, beast from th?r, wild animal: see fierce
A large extinct ground sloth of the genus Megatherium of the Miocene Epoch through the Pleistocene Epoch.
Origin of megatheriumNew Latin Megathērium genus name mega- Greek thērion wild beast ; see treacle .
Ancient Greek μέγας (megas, “great”) + θηρίον (thērion, “beast”)