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pH

noun
/ˌpiː ˈeɪtʃ/
/ˌpiː ˈeɪtʃ/
[singular] (chemistry化学)
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  1. a measurement of the level of acid or alkali in a solution or substance. In the pH range of 0 to 14 a reading of below 7 shows an acid and of above 7 shows an alkali.pH 值(溶液或物质的酸碱度。pH 值介于 0 至 14,7 以下为酸,7 以上为碱)
    • a pH of 7.5pH 值 7.5
    • to test the pH level of the soil测试土壤的酸碱度
    Topics Physics and chemistryc2
    Word Originearly 20th cent.: from p representing German Potenz ‘power’ + H, the symbol for hydrogen.

See also: pH


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