megatherian mammal megatherian • megatheriid · · · Info · Definitions · Synonyms · Characters · · megatherian mammal · · Text Common · · Latin · · Scripts 18 · · Length 7 · · Syllables Definitions · · · (noun) a large extinct ground sloth. Synonyms: megatherian, megatheriid, megatherian mammal. · · Noun Definition 1 Synonyms · · · megatherian · · Synonym 1 megatheriid · · Synonym 2 Characters · · space U+0020 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 l latin small letter l U+006C 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