sodium thiosulfate sodium thiopental • sodium thiosulphate · · · Info · Definitions · Synonyms · Characters · · sodium thiosulfate · · Text Common · · Latin · · Scripts 18 · · Length 6 · · Syllables Definitions · · · (noun) a compound used as a fixing agent in photographic developing. Synonyms: hypo, sodium thiosulphate, sodium thiosulfate. · · Noun Definition 1 Synonyms · · · hypo · · Synonym 1 sodium thiosulphate · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 f latin small letter f U+0066 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 o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075