Mĕg'a-thē'ri-ŭm1, n.
n. [N. Lat., Fr. mégathère, from Gr. μέγας, great, and θηρίον, beast.] (Paleon.) An extinct and gigantic mammiferous quadruped allied to the anteaters and sloths. Its remains are found in South America.
Megatherium Cuvieri.
