| NKTR | natural killer triggering receptor |
|---|---|
| NS | natural science; Neosporin; nephrosclerosis; nephrotic syndrome; nervous system; neurological surger... |
| NTA | natural thymocytotoxic autoantibody; nitrilotriacetic acid; Nurse Training Act |
| OC | 1) Osteo-Calcin 2) Oral Contraceptive |
| OCG | Oral Cholecysto-Graphy |