from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. See sodium thiosulfate.
  • n. A hypodermic syringe.
  • n. A hypodermic injection.
  • transitive v. To stimulate by or as if by hypodermic injection: "pandering to community fears in order to hypo ratings” ( Variety).

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Melancholy; a fit of ‘hypochondria’; a morbid depression (obsolete by 1881 according to Eric Partridge.

from the GNU version of the Collaborative International Dictionary of English

  • n. Hypochondria.
  • n. Sodium hyposulphite, or thiosulphate, a solution of which is used as a bath to wash out the unchanged silver salts in a picture.

from The Century Dictionary and Cyclopedia

  • n. Like hyp. an abbreviation of hypochondria: commonly in the plural.
  • n. In photography, a common abbreviation of hyposulphite of soda, a chemical extensively used in most photographic processes.
  • n. A prefix of Greek origin, cognate with sub- of Latin origin, and meaning primarily ‘under,’ either in place or in degree (less,' ‘less than’).
  • n. In the manufacture of india-rubber goods, a trade-name for lead thiosulphate, used as a vulcanizing material. Also known as black hypo.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a piston syringe that is fitted with a hypodermic needle for giving injections
  • n. a compound used as a fixing agent in photographic developing


Short for hyposulfite.
Short for hypodermic.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From the abbreviation of various terms beginning with hypo-, from Ancient Greek ὑπό (hupo, "under"). (Wiktionary)



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  • ...and especially whenever my hypos get such an upper hand of me...

    - Melville, Moby-Dick, ch. 1

    July 23, 2008