| Abbreviations | Meaning |
 | IAA | Indoleacetic Acid |
| XA | Xanthurenic Acid; X-ray Analysis |
| HFBA | Heptafluorobutyric Acid |
| GPA(3-) | 3-guanidinopropionic Acid |
| AO | Acid Output |
| Z-DNA | Zig-zag (left-handed Helical) Deoxyribonucleic Acid |
| SSDNA | Single-stranded Deoxyribonucleic Acid [DNA] |
| DADA | Dichloroacetic Acid Diisopropylammonium Salt |
| AFA | Acromegaloid Facial Appearance [syndrome]; Advanced First Aid; Alcohol-formaldehyde-acetic Acid [fixative] |
| DABA | 2,4-diaminobutyric Acid |
| NSD | N-acetylneuraminic Acid Storage Disease |
| RARA | Retinoic Acid Receptor Alpha |
| DGU | Uracil Deoxyribonucleic Acid Glycosylase |
| ADU | Alkaline Deoxyribonucleic Acid Unwinding |
| CCE | Carboline Carboxylic Acid Ester |
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