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    litmus

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    litmus

    Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++
    Related topics: Chemistry
    lit·mus /ˈlɪtməs/ noun [uncountable]  HCa chemical that turns red when it touches acid, and blue when it touches an alkali 石蕊〔一种遇酸变红、遇碱变蓝的化学物质〕
    Examples from the Corpus
    litmus• The case of travellers is something of a litmus test.• Forbes, meanwhile, has made winning Arizona his litmus test for capturing the nomination.• The use of litmus paper furnishes another example of such a transformation.• What clearer laboratory or litmus test could there be to show that our methods are genuinely additional?• He instituted a stringent litmus test on doctrinal matters.• In a drawer the litmus paper mused upon which way to turn.• Comparison is the only true litmus test of objectivity.    Origin litmus (1300-1400) Old Norse litmosi, from litr “coloring substance” + mosi “moss”
    lit·mus nounChineseSyllable
    when a touches acid, it chemical that Corpus red turns


    litmus
    lit‧mus /ˈlɪtməs/ noun [uncountable]
     Date: 1300-1400
     Language: Old Norse
     Origin: litmosi, from litr 'coloring substance' + mosi 'moss'
    a chemical that turns red when it touches acid, and blue when it touches an alkali


    lit·musBrE /ˈlɪtməs/ 🔊NAmE /ˈlɪtməs/ 🔊 noun [uncountable] a substance that turns red when it touches an acid and blue when it touches an alkali 石蕊（一种遇酸变红而遇碱则变蓝的物质）◆litmus paper石蕊试纸