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Noun: litmus test  lit-mus test
  1. A colouring material (obtained from lichens) that turns red in acid solutions and blue in alkaline solutions; used as a very rough acid-base indicator
    - litmus
  2. A test that relies on a single indicator
    "her litmus test for good breeding is whether you split infinitives"

Derived forms: litmus tests

Type of: acid-base indicator, exam, examination, test

Part of: litmus paper

Encyclopedia: Litmus test