| Abbreviations | Meaning |
 | KL | Karhunen-Loeve [transform]; Kidney Lobe; Kit Ligand; Klebs-Loeffler [bacillus]; Kleine-Levin [syndrome] |
 | ABA | Antibacterial Activity |
 | ABCDES | Adjust Medication, Bacterial Prophylaxis, Cervical Spine Disease, Deep Vein Thrombosis Prophylaxis, Evaluate Extent And Activity Of Disease, Stress-dose Steroid Coverage [preoperative Evaluation In Rheumatoid Diseases] |
 | L | Outer Membrane Layer Of Cell Wall Of Gram-negative Bacteria [layer] |
 | BKD | Bacterial Kidney Disease |
 | BAC | Bacterial Artificial Chromosome |
 | RNA | Radionuclide Angiography; Registered Nurse Anesthetist; Ribonucleic Acid; Rough, Noncapsulated, Avirulent [bacterial Culture] |
 | BCHL, BCHL | Bacterial Chlorophyll |
 | IBIS | Invasive Bacterial Infection Surveillance [study] |
 | MGIT | Mycobacterial Growth Indicator Tube |
 | ACB | Antibody-coated Bacteria; Aortocoronary Bypass; Arterialized Capillary Blood; Asymptomatic Carotid Bruit |
 | F+ | A Bacterial Cell Having An F Plasmid |
 | L-VARIANT | A Defective Bacterial Variant That Can Multiply On Hypertonic Medium |
 | ABE | Acute Bacterial Endocarditis |
 | L | Lactobacillus |