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单词 litmus
释义

Definition of litmus in English:

litmus

noun ˈlɪtməsˈlɪtməs
mass noun

  • A dye obtained from certain lichens that is red under acid conditions and blue under alkaline conditions.

    石蕊

    Example sentencesExamples
    • During the 1660s, Robert Boyle discovered that certain plant extracts, such as litmus, can be used to distinguish acids from bases.
    • In the presence of a basic solution, litmus will lose hydronium ions and turn blue.

Origin

Middle English: from Old Norse lit-mosi, from litr 'dye' + mosi 'moss'.

Definition of litmus in US English:

litmus

nounˈlɪtməsˈlitməs

  • A dye obtained from certain lichens that is red under acid conditions and blue under alkaline conditions.

    石蕊

    Example sentencesExamples
    • In the presence of a basic solution, litmus will lose hydronium ions and turn blue.
    • During the 1660s, Robert Boyle discovered that certain plant extracts, such as litmus, can be used to distinguish acids from bases.

Origin

Middle English: from Old Norse lit-mosi, from litr ‘dye’ + mosi ‘moss’.
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更新时间：2025/8/23 23:49:47