litmus : Idioms & Phrases
Index
Litmus paper
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noun unsized paper treated with litmus for use as an acid-base indicator
WordNet
(Chem.) , unsized paper saturated with blue or red litmus, used in testing for acids or alkalies.
Webster 1913
litmus test
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noun 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
litmus.
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noun a test that relies on a single indicator
- her litmus test for good breeding is whether you split infinitives