Definitions

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Paleon.) One of a family of extinct edentates found in America. The family includes the megatherium, the megalonyx, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun paleontology One of a family of extinct edentates found in America, including the megatherium and the megalonyx, among others.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Megatherium +‎ -oid

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Examples

  • To these succeed transported soils (_alluvium_), containing the gigantic bones of ancient mammalia, such as the mastodons, the dinotherium, and the megatheroid animals, among which is the mylodon of Owen, an animal upwards of eleven feet in length, allied to the sloth.

    The World's Greatest Books — Volume 15 — Science Various 1909

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