a social unit composed of two parents and one or more children.
(sociol, anthropol) a primary social unit consisting of parents and their offspring Compare extended family
nuclear family n.
A family unit consisting of a mother and father and their progeny.
A type of family made up only of parents and their children. (Compare extended family.)
noun 1. (def 2). noun 1. the splitting of an atomic nucleus into approximately equal parts, either spontaneously or as a result of the impact of a particle usually with an associated release of energy Sometimes shortened to fission Compare nuclear fusion
adjective not having or allowing nuclear weapons or materials, esp. within a specified area; also, not having nuclear power Examples The city declared itself a nuclear-free zone.
- Nuclear-free zone
[noo-klee-er-free, nyoo- or, by metathesis, -kyuh-ler-] /ˈnu kli ərˌfri, ˈnyu- or, by metathesis, -kyə lər-/ noun 1. any area in which nuclear weapons, power plants, or materials are not allowed. noun 1. an area barred, esp by local authorities, to the storage or deployment of nuclear weapons An area in which nuclear weapons, by choice […]
noun 1. Physics. fissile or fertile material that undergoes fission in a nuclear reactor. 2. any light element, as hydrogen or helium, that undergoes fusion and gives off energy within the interior of stars. noun 1. a fuel that provides nuclear energy, used in nuclear power stations, nuclear submarines, etc