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



BrE BrE//ˌpiː ˈeɪtʃ//
; NAmE NAmE//ˌpiː ˈeɪtʃ//
[singular] (chemistry)
jump to other results
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 Wordfinderacid, catalyst, chemistry, compound, formula, molecule, pH, react, solution, valency Word Originearly 20th cent.: from p representing German Potenz ‘power’ + H, the symbol for hydrogen.
See the Oxford Advanced American Dictionary entry: pH