- any of the huge, slothlike animals of the extinct genus Megatherium, or closely related genera, that lived from the Oligocene to the Pleistocene epochs.
Origin of megathere
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- any of various gigantic extinct American sloths of the genus Megatherium and related genera, common in late Cenozoic times
C19: from New Latin megathērium, from mega- + -there, from Greek thērion wild beast