| Abbreviations | Meaning |
 | HEPES | N-2-hydroxyethylpiperazine-N-2-ethanesulfonic [acid] |
 | AAM | Acute Aseptic Meningitis; American Academy Of Microbiology; Amino Acid Mixture |
 | ACD | Absolute Cardiac Dullness; Absolute Claudication Distance; Acid-citrate-dextrose [solution]; Actinomycin D; Active Compression-decompression |
 | PAA | Phenylacetic Acid |
 | DPA | Dipropylacetic Acid |
 | UA/C | Uric Acid/creatinine [ratio] |
 | POLY-C, POLY(C) | Polycytidylic Acid |
 | CFAE | Ceftiofur Free Acid Equivalent |
 | HIDA | Tetrahydroindazolone Carboxylic Acid |
 | SNORNA | Small Nucleolar Ribonucleic Acid [RNA] |
 | TCA | Tricarboxylic Acid |
 | IAP | Immunosuppressive Acidic Protein |
 | AACA | Acylaminocephalosporanic Acid |
 | PAS | Phosphatase Acid Serum |
 | AAD | Aminoadipic Acid |