litmus test

See synonyms for litmus test on
  1. Chemistry. the use of litmus paper or solution to test the acidity or alkalinity of a solution.

  2. a crucial and revealing test in which there is one decisive factor.

Origin of litmus test

First recorded in 1955–60; so called from chemical tests in which litmus or litmus paper is an indicator

Words Nearby litmus test Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use litmus test in a sentence

British Dictionary definitions for litmus test

litmus test

  1. a test to establish the acidity or alkalinity of a mixture

  2. a critical indication of future success or failure

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012