4 results for: litmus test

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litmus test

–noun

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

]

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

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litmus test
n.

A test for chemical acidity or basicity using litmus paper.
A test that uses a single indicator to prompt a decision: "The word 'hopefully' has become the litmus test to determine whether one is a language snob or a language slob" (William Safire).

litmus test
noun
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"