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Definitions of litmus
  1. noun
    a coloring material (obtained from lichens) that turns red in acid solutions and blue in alkaline solutions; used as a very rough acid-base indicator

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Definition that contains litmus
  • base any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water
  • acid any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
  • alkali any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water
  • pertusaria crustose lichens that are a source of the dye archil and of litmus
  • roccella a source of the dye archil and of litmus
  • genus pertusaria crustose lichens that are a source of the dye archil and of litmus
  • roccella tinctoria a source of the dye archil and of litmus
  • litmus paper unsized paper treated with litmus for use as an acid-base indicator
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