| LDB | lamb dysentery bacillus; Legionnaires' disease bacillus |
|---|---|
| AAA | abdominal aortic aneurysm/aneurysmectomy; acne-associated arthritis; acquired aplastic anemia; acute... |
| AN | acanthosis nigricans; acne neonatorum; acoustic neuroma; adult, normal; ala nasi; amyl nitrate; aneu... |
| NCA | National Certification Agency; National Council on Aging; National Council on Alcoholism; neurocircu... |
| SAPHO | synovitis-acne-pustulosis hyperostosis-osteomyelitis [syndrome] |