[The logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per lite, providing a measure, on a scale from 0 to 14, of the acidity or alkalinity of a solution where less than 7 is acidic, greater than 7 is basic, and 7 is neutral. ( NCI )]
UMLS (NCI) C0020283 Relation/PAR: Unclassified Ingredients
UnitOfMeasureAtomInsens
UnitOfMeasureAtomSens
Relation/CHD: pH TEST