| NBI | neutrophil bactericidal index; no bone injury; non-battle injury |
|---|---|
| NCF | neutrophil chemotactic factor |
| NCF(C) | neutrophil chemotactic factor (complement) |
| NCR | National Research Council; neutrophil chemotactic response; no carbon required; nuclear/cytoplasmic ... |
| NDF | neutrophil diffraction factor; new dosage form |