pH
unit of measure that describes the alkalinity or acidity of a solution. Negative log of the hydrogen ion concentration. Measured on a scale from 0 to 14. Greater than 7 is alkaline. less than 7 is acid. and 7 is neutral (pure water) (see acidity and alkalinity).
phase
in an electric utility system. a single primary line affixed to a pole or cross arm. Technically. phase refers to the synchronized movement of electrical energy and pertains to common designs of electric supply lines such as single phase (one primary conductor). two phase (two primary conductors). or three phase (three primary conductors).