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 7.5to test the pH level of the soilWordfinderchemistryacid,catalyst,chemistry,compound,formula,molecule,pH,react,solution,valencyWord Originearly 20th cent.: from p representing German Potenz ‘power’ + H, the symbol for hydrogen.
See pH in the Oxford Learner's Dictionary of Academic EnglishSee pH in the Oxford Advanced American Dictionary
