Found 2 items, similar to litmus test.
English → English (WordNet) Definition: litmus test litmus test n 1: 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 [syn: litmus] 2: a test that relies on a single indicator; “her litmus test for good breeding is whether you split infinitives”
English → English (gcide) Definition: litmus test litmus test \litmus test\, 1. (Chem.) A test to determine acidity or alkalinity, using litmus as an inddicator. [PJC] 2. Hence: (Fig.) A test for a single factor, which has only two outcomes, positive or negative; specifically: (Politics) the question of whether a candidate for office is for or against a particular position on an issue; -- used, e.g. by voters concerned predominantly with a single issue, to decide whether to vote for or against a candidate; as, many voters take a candidate's position on abortion as their litmus test. [PJC]