litmus

[ lit-muhs ]

/ ˈlɪt məs /

noun

a blue coloring matter obtained from certain lichens, especially Roccella tinctoria. In alkaline solution litmus turns blue, in acid solution, red: widely used as a chemical indicator.

Origin of litmus

1495–1505; earlier lytmos<Old Norse litmosi dye-moss, equivalent to lit- color, dye + mosi moss

Words nearby litmus

litigate, litigation, litigation friend, litigator, litigious, litmus, litmus paper, litmus test, litotes, litre, Litt. B.

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for litmus

But when did they become the litmus test of competence in office?
100 Years of Right (And Left) Moves|Robert Shrum|March 31, 2014|DAILY BEAST
So they are a litmus paper for wider fertility—not a significant driver of Israeli birthrates.
Israel’s Sperm Clinic Crisis|Alastair Sloan|March 16, 2014|DAILY BEAST
Opposition to the Affordable Care Act in toto might linger as a litmus test for conservatives.
Everything is Obamacare!|Jamelle Bouie|March 3, 2014|DAILY BEAST
The right-wing base and media will make it a litmus test issue.
Could a Larger Minimum Wage Hike Sell?|Michael Tomasky|November 13, 2013|DAILY BEAST

The Veterans of Foreign Wars organized an Americanization committee that promoted the song as a litmus test of loyalty.
Star-Spangled Confederates: How Southern Sympathizers Decided Our National Anthem|Jefferson Morley|July 4, 2013|DAILY BEAST
It is not perfectly soluble in water; and does not turn the colour of litmus red.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I|Arnold Cooley
Tincture or solution of litmus, or an alkaline solution of indigo.
Cooley's Practical Receipts, Volume II|Arnold Cooley
Agar plates, litmus, glucose broth and a sheet of clean paper were at the same time exposed in the box.
Handbook of Medical Entomology|William Albert Riley
Both the gas and its aqueous solution exercise a feebly acid reaction on litmus.
Cooley's Practical Receipts, Volume II|Arnold Cooley
It is therefore important to control the addition of milk of lime by the use of litmus paper.
Scientific American Supplement, No. 286|Various

British Dictionary definitions for litmus

litmus

/ (ˈlɪtməs) /

noun

a soluble powder obtained from certain lichens. It turns red under acid conditions and blue under basic conditions and is used as an indicator

Word Origin for litmus

C16: perhaps from Scandinavian; compare Old Norse litmosi, from litr dye + mosi moss

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

Cultural definitions for litmus

litmus

[ (lit-muhs) ]

In chemistry, a kind of paper used to tell whether a solution is an acid or a base. Acids turn blue litmus paper red; bases turn red litmus paper blue. Other testing paper or sophisticated instruments can be used to measure the pH of a solution more precisely.

notes for litmus

The term litmus is often used to refer to a general and simple test: “Your vote on this issue is a litmus test of your political philosophy.”

Medical definitions for litmus

litmus

[ lĭt′məs ]

n.

A water-soluble blue powder derived from lichens that changes to red with increasing acidity and to blue with increasing basicity.

Scientific definitions for litmus

litmus

[ 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 a mixture of various closely related heterocyclic organic compounds.♦ Litmus is typically added to paper to make litmus paper, which can be used to determine whether a solution is basic or acidic by dipping a strip of the paper into the solution and seeing how the paper changes color.

单词	litmus
释义	litmus [ lit-muhs ] / ˈlɪt məs / noun a blue coloring matter obtained from certain lichens, especially Roccella tinctoria. In alkaline solution litmus turns blue, in acid solution, red: widely used as a chemical indicator. Origin of litmus 1495–1505; earlier lytmos<Old Norse litmosi dye-moss, equivalent to lit- color, dye + mosi moss Words nearby litmus litigate, litigation, litigation friend, litigator, litigious, litmus, litmus paper, litmus test, litotes, litre, Litt. B. Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for litmus But when did they become the litmus test of competence in office? 100 Years of Right (And Left) Moves\|Robert Shrum\|March 31, 2014\|DAILY BEAST So they are a litmus paper for wider fertility—not a significant driver of Israeli birthrates. Israel’s Sperm Clinic Crisis\|Alastair Sloan\|March 16, 2014\|DAILY BEAST Opposition to the Affordable Care Act in toto might linger as a litmus test for conservatives. Everything is Obamacare!\|Jamelle Bouie\|March 3, 2014\|DAILY BEAST The right-wing base and media will make it a litmus test issue. Could a Larger Minimum Wage Hike Sell?\|Michael Tomasky\|November 13, 2013\|DAILY BEAST The Veterans of Foreign Wars organized an Americanization committee that promoted the song as a litmus test of loyalty. Star-Spangled Confederates: How Southern Sympathizers Decided Our National Anthem\|Jefferson Morley\|July 4, 2013\|DAILY BEAST It is not perfectly soluble in water; and does not turn the colour of litmus red. Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I\|Arnold Cooley Tincture or solution of litmus, or an alkaline solution of indigo. Cooley's Practical Receipts, Volume II\|Arnold Cooley Agar plates, litmus, glucose broth and a sheet of clean paper were at the same time exposed in the box. Handbook of Medical Entomology\|William Albert Riley Both the gas and its aqueous solution exercise a feebly acid reaction on litmus. Cooley's Practical Receipts, Volume II\|Arnold Cooley It is therefore important to control the addition of milk of lime by the use of litmus paper. Scientific American Supplement, No. 286\|Various British Dictionary definitions for litmus litmus / (ˈlɪtməs) / noun a soluble powder obtained from certain lichens. It turns red under acid conditions and blue under basic conditions and is used as an indicator Word Origin for litmus C16: perhaps from Scandinavian; compare Old Norse litmosi, from litr dye + mosi moss 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 Cultural definitions for litmus litmus [ (lit-muhs) ] In chemistry, a kind of paper used to tell whether a solution is an acid or a base. Acids turn blue litmus paper red; bases turn red litmus paper blue. Other testing paper or sophisticated instruments can be used to measure the pH of a solution more precisely. notes for litmus The term litmus is often used to refer to a general and simple test: “Your vote on this issue is a litmus test of your political philosophy.” The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Medical definitions for litmus litmus [ lĭt′məs ] n. A water-soluble blue powder derived from lichens that changes to red with increasing acidity and to blue with increasing basicity. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for litmus litmus [ 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 a mixture of various closely related heterocyclic organic compounds.♦ Litmus is typically added to paper to make litmus paper, which can be used to determine whether a solution is basic or acidic by dipping a strip of the paper into the solution and seeing how the paper changes color. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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