litmus

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lit·mus

 (lĭt′məs)
n.
A water-soluble bluish powder derived from certain lichens that changes to red with increasing acidity and to deeper blue with increasing basicity.

[Middle English litemose (of Scandinavian origin; akin to Old Norse litmosi, dyer's herbs litr, color, dye + mosi, bog, moss) and Middle English lykemose (from Middle Dutch lijkmoes, variant of lēcmoes : lēken, to drip + moes, moss).]

litmus

(ˈlɪtməs)
n
(Elements & Compounds) a soluble powder obtained from certain lichens. It turns red under acid conditions and blue under basic conditions and is used as an indicator
[C16: perhaps from Scandinavian; compare Old Norse litmosi, from litr dye + mosi moss]

lit•mus

(ˈlɪt məs)

n.
a blue coloring matter obtained from certain lichens, esp. Roccella tinctoria, that turns blue in alkaline solution and red in acid solution: widely used as a chemical indicator.
[1495–1505; earlier lytmos < Old Norse litmosi dye-moss =lit- color, dye + mosi moss]

lit·mus

(lĭt′məs)
A colored powder, obtained from certain lichens, that changes to red in an acid solution and to blue in an alkaline solution. ♦ Litmus is typically added to paper to make litmus paper, which is used to determine whether a solution is basic or acidic.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.litmus - a coloring material (obtained from lichens) that turns red in acid solutions and blue in alkaline solutionslitmus - 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
acid-base indicator - an indicator that changes color on going from acidic to basic solutions
litmus paper - unsized paper treated with litmus for use as an acid-base indicator
Translations

litmus

[ˈlɪtməs]
A. Ntornasol m
B. CPD litmus paper Npapel m de tornasol
litmus test Nprueba f de tornasol (fig) → prueba f de fuego

litmus

nLackmus m or nt
References in periodicals archive ?
I can say that there will not be a political litmus test for me in the future," she said.
While a political litmus test was not used throughout the Justice Department, it was the case in the Civil Rights Division in addition to the Immigration Review section under Mr.
Legal scholars Douglas Kmiec and Nicholas Cafardi, who have unimpeachable antiabortion credentials, among others have advanced compelling arguments regarding the futility of using a legal ban as a political litmus test.
Humanists generally abhor the idea of a political litmus test for professed Humanists because it smacks of exclusion, which goes squarely against Humanism's standard of fair consideration of all ideas.
Defense; What Political Litmus Test Does Gore Have for