| Abbreviations | Meaning |
 | NTA | Natural Thymocytotoxic Autoantibody; Nitrilotriacetic Acid; Nurse Training Act |
| EMTA | Endomethylene Tetrahydrophthalic Acid |
| AA | Active Avoidance; Acupuncture Analgesia; Acute Appendicitis; Adenine Arabinoside; Adenylic Acid; Adjuvant Arthritis; Adrenal Androgen |
| KA | Alkaline Phosphatase; Kainic Acid; Keratoacanthoma; Keto Acid; Ketoacidosis; King-Armstrong [unit]; Knowledge Acquisition; Knowledge Aggregate |
| RNA | Ribonucleic Acid |
| GABOA | Gamma-amino-beta-hydroxybutyric Acid |
| 5-HIAA | 5-hydroxyindoleacetic Acid |
| NAMN | Nicotinic Acid Mononucleotide |
| GD-DTPA | Gadolinium-diethylene-triamine-pentaacetic Acid |
| TRF | Targeted Ribonucleic Acid [RNA] Fingerprinting |
| TDNA | Transfer Deoxyribonucleic Acid |
| PAT | Picric Acid Turbidity |
| A | Total Acidity |
| PSA | Polysialic Acid |
| SS(C)DNA | Single-stranded Circular Deoxyribonucleic Acid |
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