'Megatherium' definitions:
Definition of 'Megatherium'
From: WordNet
noun
Type genus of the Megatheriidae [syn: Megatherium, genus Megatherium]
Definition of 'Megatherium'
From: GCIDE
- Megathere \Meg"a*there\, Megatherium \Meg`a*the"ri*um\, n. [NL. megatherium, fr. Gr. me`gas great + qhri`on beast.] (Paleon.) An extinct gigantic quaternary mammal, allied to the ant-eaters and sloths. Its remains are found in South America. [1913 Webster]