n.1.(Paleon.) One of a family of extinct edentates found in America. The family includes the megatherium, the megalonyx, etc.
References in classic literature ?
The great size of the bones of the Megatheroid animals, including the Megatherium, Megalonyx, Scelidotherium, and Mylodon, is truly wonderful.
An unusual megatheroid sloth from the middle Miocene of Quebrada Honda (Bolivia).