megatheriidae megatheriid • Megatheriidae · · · Info · Definitions · Characters · · megatheriidae · · Text Latin · · Script 13 · · Length 5 · · Syllables Definitions · · · (noun) extinct ground sloths. Synonyms: Megatheriidae, family Megatheriidae. · · Noun Definition 1 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 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 r latin small letter r U+0072 t latin small letter t U+0074