More on Megatherium from Infoplease:

• megatherium - megatherium megatherium [Gr.=large beast], extinct ground sloth, of the genus Megatherium, that was ...
• Megatherium - Megatherium (Greek, great-beast). A gigantic extinct quadruped of the sloth kind. Source: ...
• megathere: meaning and definitions - megathere: Definition and Pronunciation
• sloth - sloth sloth , arboreal mammal found in Central and South America distantly related to armadillos ...
• Encyclopedia: Vertebrate Zoology - Encyclopeadia articles concerning Vertebrate Zoology.