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Webster 1913 Edition
Megatherium
{
Meg′a-there
, ‖Megˊa-the′ri-um
, }Noun.
[NL.
megatherium
, fr. Gr. μέγασ
great + θηρίον
beast.] (Paleon.)
An extinct gigantic quaternary mammal, allied to the ant-eaters and sloths. Its remains are found in South America.