hypo Meaning, Definition & Usage

  1. noun a compound used as a fixing agent in photographic developing
    sodium thiosulfate; sodium thiosulphate.
  2. noun a piston syringe that is fitted with a hypodermic needle for giving injections
    hypodermic syringe; hypodermic.

WordNet

Hy"po noun
Definitions
  1. Hypochondria. Colloq.
Hy"po noun
Etymology
Abbrev. from hyposulphite.
Definitions
  1. (Photog.) Sodium hyposulphite, or thiosulphate, a solution of which is used as a bath to wash out the unchanged silver salts in a picture. Colloq.

Webster 1913