- chemical acidity/alkalinity
- the hydrogen ion concentration or pH.
Definition from: CRISP Thesaurus via Unified Medical Language System at the National Library of Medicine
- 1 : The quality, state, or degree of being sour or chemically acid <the acidity of lemon juice>.
2 : The quality or state of being excessively or abnormally acid.
Definition from: Merriam-Webster's Medical Dictionary by Merriam-Webster Inc.
Related discussion in the Handbook
See also Understanding Medical Terminology.