litmus_test

Words with a similar base: litmus_test

'litmus_test'

[litmus.n.01] as in: 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_test'

[litmus_test.n.02] as in: a test that relies on a single indicator

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Examples:
her litmus test for good breeding is whether you split infinitives