pH
MEASURE OF THE ACIDITY OR BASICITY OF AN AQUEOUS SOLUTION
PH Scale; PH value; PH level; PH 7; ㏗; Acid and base; Acids and bases; Power of hydrogen; Pondus hydrogenii; PH balance; Ph Scale; PH Imbalance; Potential of hydrogen; Ph; Negative pH; Hydrogen-ion concentration; PH scale; Ph scale; Potentia Hydrogenii; Neutral solution; Potential Of Hydrogen; P.H.; P.h.; P H; PH strip; Potential hydrogen; Ocean acidity; Seawater scale; P.h. scale
¦ noun Chemistry a figure expressing acidity or alkalinity on a logarithmic scale on which 7 is neutral, lower values are more acid, and higher values more alkaline.
Origin
early 20th cent.: from p representing Ger. Potenz 'power' + H, the symbol for hydrogen (the pH being derived from the reciprocal of the hydrogen-ion concentration).