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WordReference Random House Learner's Dictionary of American English © 2024pH, - Chemistrya symbol used to describe the amount of acidity or alkalinity of a chemical solution on a scale of 0 (more acidic) to 14 (more alkaline).
WordReference Random House Unabridged Dictionary of American English © 2024Ph, [Chem.]- Chemistryphenyl.
pH, [Chem.]- Chemistrythe symbol for the logarithm of the reciprocal of hydrogen ion concentration in gram atoms per liter, used to express the acidity or alkalinity of a solution on a scale of 0 to 14, where less than 7 represents acidity, 7 neutrality, and more than 7 alkalinity.
ph, [Optics.]- Opticsphot;
phots.
ph., - phase.
- phone.
P.H., - Public Health.
Collins Concise English Dictionary © HarperCollins Publishers:: pH n - potential of hydrogen; a measure of the acidity or alkalinity of a solution equal to the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimetre of solution. Pure water has a pH of 7, acid solutions have a pH less than 7, and alkaline solutions a pH greater than 7
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