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litmus test

DEFINITIONS OF: litmus test

1

n 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

Synonyms:
litmus
Type of:
acid-base indicator
an indicator that changes color on going from acidic to basic solutions

n a test that relies on a single indicator

“her litmus test for good breeding is whether you split infinitives”
Type of:
exam, examination, test
a set of questions or exercises evaluating skill or knowledge
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