1. (noun)hypo, sodium thiosulphate, sodium thiosulfate a compound used as a fixing agent in photographic developing Synonyms: sodium thiosulphate, sodium thiosulfate, hypo, hypodermicsyringe, hypodermic
2. (noun)hypodermic syringe, hypodermic, hypo a piston syringe that is fitted with a hypodermic needle for giving injections Synonyms: sodium thiosulphate, hypodermicsyringe, hypo, sodium thiosulfate, hypodermic