If anyone is interested, and has read the article, as to what 'pH' means (the actual term):
The lowercase 'p' is actually a mathematical expression and not a 'letter'. The 'p' means 'negative common log'. The 'H' refers to the H+ (hydrogen ion) concentration. Concentrations are expressed in what is known as molarity, the # of moles/liter. A mole is a large # of particles, 6 x 10^23.
At a H+ concentration of say 10^-8 M (0.00000001 molarity) the pH would be 8. As the H+ concentration gets weaker (10 ^-9, 10^-10 etc.) you can see the exponent (-8, -9 ,-10) is getting smaller, the negative of this (8, 9 ,10) gets larger. That is why was acid levels decrease the pH increases.
Some texts refer to the term 'pH' as meaning the 'potential of hydrogen' or 'percent of hydrogen'. This is absolutely incorrect.
Water has a property in that the product of the H+ ions and the OH- ions is always 10^-14. That means that the pH and pOH (yes, pOH is real) always add to 14. If you were tracking alkalinity and measuring pOH it would get larger as alkalinity decreased. At a pH of 8 the pOH is 6.
The 'p' can be used with other measurements as well: pKa (acid dissociation constant), pM (metal ions), pOH, whatever.