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Litmus test

noun

Definitions

Noun
  1. 1
    A simple, binary test for the acidity or alkalinity of a substance, using litmus paper.
  2. 2
    a test that relies on a single indicator wordnet
  3. 3
    Any test which produces a binary, decisive result (for example, determining whether to appoint someone to a job) by measuring a single indicator. broadly, figuratively

    "Exams, not interviews, have become the litmus test for entry to university."

  4. 4
    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 wordnet

Etymology

From litmus + test.

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