Source : WordNet®

pH
     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 greater than 7 is acidic and less than 7 is
         basic) [syn: {pH scale}]

Source : Free On-Line Dictionary of Computing

PH
     
         The tool for looking up people in Eudora on the
        {Macintosh}.  Equivalent to {Unix}'s {finger} service.
     
        (1995-03-31)

pH
     
        {Parallel Haskell}

ph
     
         The {country code} for the Philippines.
     
        (1999-01-27)