Dictionary  PhChem. phenyl. pHChem. the symbol for the logarithm of the reciprocal of hydrogen ion concentration in gram atoms per liter, used to express the acidity or alkalinity of a solution on a scale of 0 to 14, where less than 7 represents acidity, 7 neutrality, and more than 7 alkalinity. phOptics. phot; phots. ph.1. phase. 2. phone. P.H.Public Health. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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