hypo hypnotoxin • hypo-alum · · · Info · Definitions · Synonyms · Characters · · hypo · · Text Latin · · Script 4 · · Length 2 · · Syllables Definitions · · · (noun) a compound used as a fixing agent in photographic developing. Synonyms: sodium thiosulphate, sodium thiosulfate. · · Noun Definition 1 (noun) a piston syringe that is fitted with a hypodermic needle for giving injections. Synonyms: hypodermic syringe, hypodermic. · · Noun Definition 2 Synonyms · · · sodium thiosulphate · · Synonym 1 sodium thiosulfate · · Synonym 2 hypodermic syringe · · Synonym 3 hypodermic · · Synonym 4 Characters · · h latin small letter h U+0068 o latin small letter o U+006F p latin small letter p U+0070 y latin small letter y U+0079