pH /piː ˈeɪtʃ/ (
also pˈH ˌvalue)
noun [singular][
Date: 1900-2000;
Language: German;
Origin: potenz 'power' + H, sign for hydrogen]
a number on a scale of 0 to 14 which shows how acid or
alkaline a substance is ⇒
litmus testpH of
soil with a pH of 3.1 [TahlilGaran] Dictionary of Contemporary English ▲