| NIF | negative inspiratory force; neutrophil immobilizing factor; nonintestinal fibroblast |
|---|---|
| NPBV | negative pressure body ventilator |
| NPD | narcissistic personality disorder; natriuretic plasma dialysate; negative pressure device; Niemann-P... |
| NPPE | negative pressure pulmonary edema |
| NSI | negative self-image; no signs of infection/inflammation; non-syncytium-inducing |