megatherian mammal

Definitions of megatherian mammal
  1. noun
    a large extinct ground sloth
    synonyms: megatherian, megatheriid
    see moresee less
    types:
    ground sloth, megathere
    gigantic extinct terrestrial sloth-like mammal of the Pliocene and Pleistocene in America
    type of:
    edentate
    primitive terrestrial mammal with few if any teeth; of tropical Central America and South America
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