Meaning of PH SCALE

WordNet Dictionary
	Definition:		[n]  (chemistry) p(otential of) H(ydrogen); 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 <7 is acidic and >7 is basic)
	Synonyms:		pH
	See Also:		acidity, alkalinity, hydrogen ion concentration, neutrality