- hypo, sodium thiosulphate, sodium thiosulfate - a compound used as a fixing agent in photographic developing
--1 is a kind of fixing agent, fixer
- hypodermic syringe, hypodermic, hypo - a piston syringe that is fitted with a hypodermic needle for giving injections
--2 is a kind of syringe
--2 has parts: hypodermic needle
--2 has particulars: autoinjector