Litmus (noun) Definition, Meaning & Examples

noun
  1. a blue coloring matter obtained from certain lichens, especially Roccella tinctoria. In alkaline solution litmus turns blue, in acid solution, red: widely used as a chemical indicator.
noun
  1. a soluble powder obtained from certain lichens. It turns red under acid conditions and blue under basic conditions and is used as an indicator
    Litmus (noun) Definition, Meaning & Examples

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