phs

(noun) an agency that serves as the office of Surgeon General; includes agencies whose mission is to improve the public health. Synonyms: United States Public Health Service, PHS.

(noun) (from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is more acidic);. Synonyms: pH, pH scale.