litmus test
Explore definitions, synonyms, and language insights of litmus test
Definitions
                    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
                
                    Noun
                    
            a test that relies on a single indicator; "her litmus test for good breeding is whether you split infinitives"