• (n.) One of a family (Glyptodontidae) of extinct South American edentates, of which Glyptodon is the type. About twenty species are known.
(from the article `xenarthran`) ...with 8 genera and 20 species, is the only surviving family of Cingulata. Five other families in this order are extinct and are known only from ...
Glyp'to·dont noun (Paleon.) One of a family ( Glyptodontidæ ) of extinct South American edentates, of which Glyptodon is the type. About twenty species are known. 
any edentate mammal of the extinct genus Glyptodon, of the Pleistocene Epoch, having the body covered by a horny and bony armor.