• IPA: /mɔː(ɹ)dənt/


  1. Having or showing a sharp or critical quality
    Synonyms: biting, caustic, sarcastic, keen, severe
  2. Serving to fix a dye to a fibre.
Translations Noun


  1. Any substance used to facilitate the fixing of a dye to a fibre; usually a metallic compound which reacts with the dye using chelation.
    • 1964, L.F. Salzman, English Industries of the Middle Ages, p. 208.
      In dyeing two mediums are required, the colouring matter and the mordant which fixes the dye in the wool.
  2. Any corrosive substance used in etching.
  3. A glutinous size used as a ground for gilding, to make the gold leaf adhere.
Synonyms Translations Verb

mordant (mordants, present participle mordanting; past and past participle mordanted)

  1. (transitive) To subject to the action of, or imbue with, a mordant.
    Mordant these goods for dyeing.

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