| NB | New-Born |
|---|---|
| NB | nail bed; neuro-Behc;cet [syndrome]; neuroblastoma; neurometric battery; newborn; nitrous oxide-barbiturate; normoblast; note well [Lat. nota bene]; nutrient broth |
| Nb | niobium |
| nb | newborn; note well [Lat. nota bene] |
| NBA | neuron-binding activity |
| NBC | network based computing; non-battle casualty |
| NBCC | nevoid basal cell carcinoma |
| NBCCS | nevoid basal cell carcinoma syndrome |
| NBCIE | nonbullous congential ichthyosiform erythroderma |
| NBD | neurogenic bladder dysfunction; no brain damage |