from The Century Dictionary.

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

from the GNU version of the Collaborative International Dictionary of English.

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

from Wiktionary, Creative Commons Attribution/Share-Alike License.

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

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

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


from Wiktionary, Creative Commons Attribution/Share-Alike License

From the abbreviation of various terms beginning with hypo-, from Ancient Greek ὑπό (hupo, "under").



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

    - Melville, Moby-Dick, ch. 1

    July 23, 2008

  • spotted in the news as 'hypothetical'. ie a hypothetical situation.

    the tweet examples has this as also being hypo as in low blood sugar.

    March 21, 2017