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megatherium definition

mega·theri·um (meg′ə t̸hir′ē əm)

noun

any of an extinct genus (Megatherium) of very large, plant-eating, ground-dwelling sloths
also megathere meg′a·there′ (-t̸hir′)

Etymology: ModL < Gr megas (see mega-) + thērion, beast < thēr, wild animal: see fierce

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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