| Abbreviations | Meaning |
 | GRNA | Genomic Ribonucleic Acid; Guide Ribonucleic Acid |
| VMA | Vanillylmandelic Acid (urine Levels Concordant To Serum Catecholamine Levels) |
| GABAA | Gamma-aminobutyric Acid Ionotropic Receptor Family A |
| AIBA | Aminoisobutyric Acid |
| PA | Periodic Acid |
| PTS | Para-toluenesulfonic Acid |
| AFA | Acromegaloid Facial Appearance [syndrome]; Advanced First Aid; Alcohol-formaldehyde-acetic Acid [fixative] |
| TCA | Trichloroacetic Acid |
| AS | Acidified Serum |
| SAD | Sugar, Acetone, And Diacetic Acid |
| TPA | Tannic Acid, Polyphosphomolybdic Acid, And Amino Acid |
| 2,4,5-T | 2,4,5-trichlorophenoxyacetic Acid |
| LPA | Latex Particle Agglutination; Left Pulmonary Artery; Lipoprotein A; Lysophosphatidic Acid |
| AH | Abdominal Hysterectomy; Absorptive Hypercalciuria; Accidental Hypothermia; Acetohexamide; Acid Hydrolysis; Acute Hepatitis; Adrenal Hypoplasia |
| PSA | Polysialic Acid |
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