megatherian megathere • Megatheriidae · · · Info · Definitions · Synonyms · Characters · · megatherian · · Text Latin · · Script 11 · · Length Definitions · · · (noun) a large extinct ground sloth. Synonyms: megatheriid, megatherian mammal. · · Noun Definition 1 Synonyms · · · megatheriid · · Synonym 1 megatherian mammal · · Synonym 2 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E r latin small letter r U+0072 t latin small letter t U+0074