Synonyms of litmus test

Noun

1. litmus, litmus test, acid-base indicator

usage: 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

2. litmus test, examination, exam, test

usage: a test that relies on a single indicator; "her litmus test for good breeding is whether you split infinitives"