| n. | 1. | The chemical symbol for Neptunium, a transuranic element having atomic number 93. |
| Noun | 1. | Np - a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium Synonyms: atomic number 93, neptunium |
| 2. | NP - a registered nurse who has received special training and can perform many of the duties of a physicianSynonyms: nurse clinician, nurse practitioner |
| 1. | (complexity) | NP - nondeterministic polynomial time. | |
| 2. | (networking) | np - The country code for Nepal. |