| Abbreviations | Meaning |
 | TSA | Toluene Sulfonic Acid |
 | APG | Acid-precipitated Globulin; Air Plethysmography; Ambulatory Patient Group; Animal Pituitary Gonadotropin; Antegrade Pyelography |
 | LEURS | Leucyl Ribonucleic Acid Synthetase |
 | MOMA | 3,4-methylenedioxidemethylamphetamine; Methylhydroxymandelic Acid |
 | INA | Infectious Nucleic Acid; Inferior Nasal Artery; Instrumentation Amplifier; International Neurological Association |
 | TCA | Total Cholic Acid |
 | BAIF | Bile Acid Independent Flow |
 | AWMN | Acid Waters Monitoring Network [UK] |
 | UAN | Uric Acid Nitrogen |
 | PAS | Periodic Acid-Schiff [reaction] |
 | PAA | Phosphonoacetic Acid |
 | GFAP | Glial Fibrillary Acidic Protein |
 | 3-HAT | 3-hydroxyanthranilic Acid |
 | ACPC | Aminocyclopentane Carboxylic (acid) |
 | THPA | Tetrahydropteric Acid |