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BNC: 36064 COCA: 16349

litmus

noun
/ˈlɪtməs/
/ˈlɪtməs/
[uncountable]
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  1. 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
    Oxford Collocations DictionaryLitmus is used before these nouns:
    • paper
    See full entry
    Word OriginMiddle English: from Old Norse lit-mosi, from litr ‘dye’ + mosi ‘moss’.
BNC: 36064 COCA: 16349
BNC: 36064 COCA: 16349
BNC: 36064 COCA: 16349
litmus
Chemical substances used for a specific purpose: agar, antifreeze, antioxidant...

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