quintillionth quintillion • Quintin · · · Info · Definitions · Synonyms · Characters · · quintillionth · · Text Latin · · Script 13 · · Length Definitions · · · (noun) one part in a quintillion equal parts. Synonyms: one-quintillionth. · · Noun Definition 1 (adj) the ordinal number of one quintillion in counting order. · · Adjective Definition 1 Synonyms · · · one-quintillionth · · Synonym 1 Characters · · h latin small letter h U+0068 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