pH

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pH /ˈpiːˈeɪtʃ/ noun
pH
/ˈpiːˈeɪtʃ/
noun
Learner's definition of PH
[singular] technical
: a number between 0 and 14 that indicates if a chemical is an acid or a base
◊ A chemical with a pH lower than 7 is an acid, and a chemical with a pH higher than 7 is a base.