refractiveness refractively • refractivity · · · Info · Definitions · Synonyms · Characters · · refractiveness · · Text Latin · · Script 14 · · Length 5 · · Syllables Definitions · · · (noun) the physical property of a medium as determined by its index of refraction. Synonyms: refractivity. · · Noun Definition 1 Synonyms · · · refractivity · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 n latin small letter n U+006E r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 v latin small letter v U+0076