| Np |
symbol of the chemical element neptunium. |
| NRA |
abbreviation of "National Rifle Association." |
| NSAID |
a non-steroidal anti-inflammatory drug, such as aspirin and ibuprofen. |
| -n't |
not (a contracted form used with certain verbs). |
| nth |
of, related to, or being an indefinitely large number, the last in an infinite series of increasing or decreasing values. [3 definitions] |
| nu |
the name of the thirteenth letter of the Greek alphabet. |
| nuance |
a subtle quality or difference in tone, meaning, color, or the like; shade. |
| nub |
a knob or knoblike protuberance. [3 definitions] |
| nubbin |
a small, stunted ear of corn, piece of fruit, or the like. [2 definitions] |
| nubble |
a small knob or lump; a little nub. |
| nubbly |
full of or covered with small knobs or lumps. |
| nubby |
having or covered with nubs or nubbles. |
| nubile |
of an age or physical condition suited to marriage; marriageable. [2 definitions] |
| nucha |
the nape of the neck. [2 definitions] |
| nuclear |
in physics and biology, of, relating to, or being an atomic nucleus. [3 definitions] |
| nuclear emulsion |
any of several photographic emulsions used to record the tracks of charged subatomic particles. |
| nuclear energy |
energy released from atomic nuclei, as in nuclear fission or fusion. |
| nuclear family |
a self-contained unit consisting of a father and mother and their children living together in one household. (Cf. extended family.) |
| nuclear fission |
the splitting of an atomic nucleus into lighter fragments, usu. two of comparable mass, with an accompanying release of energy, as in the explosion of an atomic bomb. |
| nuclear fusion |
the fusion of atomic nuclei into a more massive nucleus, accompanied by a release of energy, as in the explosion of a hydrogen bomb. |
| nuclear physics |
the branch of physics that deals with the forces, behaviors, and structures of atomic nuclei. |