quintillion Quintillian • quintillionth · · · Info · Definitions · Characters · · quintillion · · Text Latin · · Script 11 · · Length Definitions · · · (noun) the number that is represented as a one followed by 18 zeros. · · Noun Definition 1 Characters · · i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F q latin small letter q U+0071 t latin small letter t U+0074 u latin small letter u U+0075