Acidity n. : The quality of being sour; sourness; tartness; sharpness to the taste; as, the acidity of lemon juice.

Example:
What is the difference in Acidity between wooded and unwooded chardonnays?

Taxonomy
acids, proton, aq, bond, reactions, H2O, H3O, HCl, hydrogen, molecule, electrons, atom, conjugate base, Lewis acids, oxygen, Ka, electronegative, Ka1.

Defination from the web:
acidity to hydrogen in 1884. ... The electronegative element need not be directly bonded to the acidic hydrogen to increase its acidity. ...