Search Result：ph scale
ph scale 
(TTS Sound)
(TTS Sound)Overview of noun ph_scale
The noun ph scale has 1 sense
- pH, pH scale -- ((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);)