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Definition of pH noun from the Oxford Advanced Learner's Dictionary

pH

noun
 
/ˌpiː ˈeɪtʃ/
 
/ˌpiː ˈeɪtʃ/
 [singular] (chemistry)
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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.
    • a pH of 7.5
    • to test the pH level of the soil
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    Topics Physics and chemistryc2
    Word Originearly 20th cent.: from p representing German Potenz ‘power’ + H, the symbol for hydrogen.
See pH in the Oxford Advanced American DictionarySee pH in the Oxford Learner's Dictionary of Academic English
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perspective
noun
 
 
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