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See more synonyms for prognostic on Thesaurus.com
  1. of or relating to prognosis.
  2. predictive of something in the future: prognostic signs and symbols.
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  1. a forecast or prediction.
  2. an omen or portent; sign.
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Origin of prognostic

1375–1425; (adj.) late Middle English pronostik < Medieval Latin prognōsticus < Greek prognōstikós of foreknowledge, equivalent to pro(gi)gnṓs(kein) to know1 beforehand + -tikos -tic (see pro-2, gnostic); (noun) < Latin prognōsticon < Greek prognōstikón, neuter of prognōstikós
Related formsprog·nos·ti·ca·ble, adjectiveprog·nos·ti·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for prognostic

Historical Examples

  • "She will recover," he murmured, as though giving utterance to a prognostic.

    The Three Cities Trilogy, Complete

    Emile Zola

  • The prognostic importance of the enumeration of the white blood corpuscles.

  • Wat Wilder has observed it at the same time, and confirms the prognostic.

    The Lone Ranche

    Captain Mayne Reid

  • It was Ellison who suggested that they were prognostic of death.

  • For that it was a prognostic of some fearful calamity, no one thought of doubting.

    Robin Tremayne

    Emily Sarah Holt

British Dictionary definitions for prognostic


  1. of, relating to, or serving as a prognosis
  2. foretelling or predicting
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  1. med any symptom or sign used in making a prognosis
  2. a sign or forecast of some future occurrence
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Word Origin

C15: from Old French pronostique, from Latin prognōsticum, from Greek prognōstikon, from progignōskein to know in advance
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for prognostic


c.1600, from Medieval Latin prognosticus, from Greek prognostikos "foreknowing," from progignoskein (see prognosis). Related: Prognostical (1580s).

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Online Etymology Dictionary, © 2010 Douglas Harper

prognostic in Medicine


  1. Of, relating to, or useful in prognosis.
  2. Of or relating to prediction; predictive.
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  1. A sign or symptom indicating the future course of a disease.
  2. A sign of a future happening; a portent.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.