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or inhibiter

[in-hib-i-ter] /ɪnˈhɪb ɪ tər/
a person or thing that inhibits.
Chemistry. a substance that decreases the rate of or stops completely a chemical reaction.
any impurity in a mineral that prevents luminescence.
Compare activator (def 3).
Rocketry. an inert antioxidant used with solid propellants to inhibit burning on certain surfaces.
Origin of inhibitor
1865-70; inhibit + -or2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for inhibitor
Historical Examples
  • Even in the DR's the inhibitor may sometimes work itself out.

  • Such birds being heterozygous for the inhibitor factor, should be whites showing some coloured "ticks."

    Mendelism Reginald Crundall Punnett
  • On account of this weakness of the inhibitor in the germ-plasm of No. 117 that inhibitor is rarely fully activated.

  • The Silky is pure for the pigmentation factor, but does not contain the inhibitor factor.

    Mendelism Reginald Crundall Punnett
  • Probably we ought to regard the beardless as a bearded wheat in which there is an inhibitor that stops the beard from growing.

    Mendelism Reginald Crundall Punnett
  • In this case we may conceive that an unusually potent condition of the inhibitor wholly stopped the development of the tail.

  • The character in this case is an inhibitor of tail development.

British Dictionary definitions for inhibitor


Also called inhibiter. a person or thing that inhibits
Also called anticatalyst. a substance that retards or stops a chemical reaction Compare catalyst
  1. a substance that inhibits the action of an enzyme
  2. a substance that inhibits a metabolic or physiological process: a plant growth inhibitor
any impurity in a solid that prevents luminescence
an inert substance added to some rocket fuels to inhibit ignition on certain surfaces
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
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Word Origin and History for inhibitor

1868 in scientific use (earlier as a Scottish legal term), agent noun in Latin form from inhibit.

Online Etymology Dictionary, © 2010 Douglas Harper
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inhibitor in Medicine

inhibitor in·hib·i·tor or in·hib·it·er (ĭn-hĭb'ĭ-tər)

  1. A substance that restrains or retards physiological, chemical, or enzymatic action.

  2. A nerve whose stimulation represses activity.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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