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mordant

[mawr-dnt]
adjective
  1. sharply caustic or sarcastic, as wit or a speaker; biting.
  2. burning; corrosive.
  3. having the property of fixing colors, as in dyeing.
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noun
  1. a substance used in dyeing to fix the coloring matter, especially a metallic compound, as an oxide or hydroxide, that combines with the organic dye and forms an insoluble colored compound or lake in the fiber.
  2. an adhesive substance for binding gold or silver leaf to a surface.
  3. an acid or other corrosive substance used in etching to eat out the lines, areas, etc.
  4. Music. mordent.
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verb (used with object)
  1. to impregnate or treat with a mordant.
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Origin of mordant

1425–75; late Middle English < Middle French, present participle of mordre to bite ≪ Latin mordēre; see -ant
Related formsmor·dant·ly, adverbun·mor·dant, adjectiveun·mor·dant·ly, adverb

Synonyms for mordant

1. cutting, stinging, acerbic, scathing.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for mordantly

mordant

adjective
  1. sarcastic or caustic
  2. having the properties of a mordant
  3. pungent
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noun
  1. a substance used before the application of a dye, possessing the ability to fix colours in textiles, leather, etcSee also lake 2 (def. 1)
  2. an acid or other corrosive fluid used to etch lines on a printing plate
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verb
  1. (tr) to treat (a fabric, yarn, etc) with a mordant
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Derived Formsmordancy, nounmordantly, adverb

Word Origin for mordant

C15: from Old French: biting, from mordre to bite, from Latin mordēre
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 mordantly

mordant

adj.

late 15c., "caustic" (of words, speech), from Middle French mordant, literally "biting," present participle of mordre "to bite," from Latin mordere "to bite, bite into; nip, sting;" figuratively "to pain, cause hurt," perhaps from PIE root mer- (2) "to rub away, harm" (see smart (v.)). Related: Mordantly. The noun sense in dyeing is first recorded 1791; the adjective in this sense is from 1902. Related: Mordancy; mordantly.

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Online Etymology Dictionary, © 2010 Douglas Harper

mordantly in Medicine

mordant

(môrdnt)
adj.
  1. Serving to fix colors in dyeing.
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n.
  1. A reagent, such as tannic acid, that fixes dyes to cells, tissues, or other materials.
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v.
  1. To treat with a mordant.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.