SkyfireDict

litmus test   (TTS Sound)

The noun litmus test has 2 senses

• litmus, litmus test -- (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 -- (a test that relies on a single indicator; "her litmus test for good breeding is whether you split infinitives")