Litmus Test Definition

noun
A test using litmus, esp. litmus paper, to determine whether a solution is an acid or a base.
Webster's New World
Any factor regarded as the decisive criterion in assessing the quality or authenticity of someone or something.
Webster's New World
A test that uses a single indicator to prompt a decision.
American Heritage
Synonyms:

Other Word Forms of Litmus Test

Noun

Singular:
litmus test
Plural:
litmus-tests

Origin of Litmus Test

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litmus test