1. [noun] (obsolete) Melancholy; a fit of ?hypochondria'; a morbid depression (obsolete by 1881 according to Eric Partridge.
2. [noun] (photography) sodium thiosulfate, a photographic fixing agent.
3. [noun] (slang) A hypoglycaemia attack in a person with diabetes.
4. [noun] (informal) The substance sodium hyposulfite.
5. [noun] (slang) A hypodermic syringe.
6. [noun] (slang) (finance) (British) Hypothecation.
7. [noun] (informal) (among law students and their professors) A hypothetical case.
8. [noun] (informal) (zoology) A hypomelanistic snake.
9. [noun] A compound used as a fixing agent in photographic developing.
10. [noun] A piston syringe that is fitted with a hypodermic needle for giving injections.
