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Litmus is a water-soluble mixture of different dyes extracted from lichens. It is often absorbed onto filter paper to produce one of the oldest forms of pH indicator, used to test materials for acidity. In an acidic medium, blue litmus paper turns red, while in a basic or alkaline medium, red litmus paper turns blue. In short, it is a dye and ...
The metaphor of a litmus test has been used in American politics since the mid-twentieth century. [1] During United States presidential election campaigns, litmus tests the nominees might use are more fervently discussed when vacancies for the U.S. Supreme Court appear likely. Advocates for various social ideas or policies often wrangle ...
Litmus test may refer to: Litmus test (chemistry) , used to determine the acidity of a chemical solution Litmus test (politics) , a question that seeks to find the character of a potential candidate by measuring a single indicator
In it, she outlines four ways to weigh whether your wealth and status pass the litmus test. ... Just because she’s pithy and sharp doesn’t exactly mean Sanchez always hits the mark.
The use of the word has become a litmus test of western resolve against Russia because of the weight it carries. ... The White House says the escalated rhetoric does not mean an escalation in U.S ...
Litmus, used by alchemists in the Middle Ages and still readily available, is a naturally occurring pH indicator made from a mixture of lichen species, particularly Roccella tinctoria. The word litmus is literally from 'colored moss' in Old Norse (see Litr). The color changes between red in acid solutions and blue in alkalis.
The new litmus test has to do with the career prospects of a former host of Fox & Friends Weekend. “Pete Hegseth is the hill to die on,” David Limbaugh tweeted on Thursday of Trump’s ...
It is similar in use to an acid test, or a litmus test in politics. The word was introduced into literary criticism by Matthew Arnold in "Preface to the volume of 1853 poems" (1853) to denote short but distinctive passages, selected from the writings of the greatest poets, which he used to determine the relative value of passages or poems which ...