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say it: NOO-klee-ur
nuclear is an adjective meaning "(weapons) deriving destructive energy from the release of atomic energy". It carries 4 recorded senses.
(weapons) deriving destructive energy from the release of atomic energy
“nuclear war”
“nuclear weapons”
“atomic bombs”
of or relating to or constituting the nucleus of an atom
“nuclear physics”
“nuclear fission”
“nuclear forces”
physics
of or relating to or constituting the nucleus of a cell
“nuclear membrane”
“nuclear division”
biology
constituting or like a nucleus
“annexation of the suburban fringe by the nuclear metropolis”
“the nuclear core of the congregation”
Definitions, synonyms and semantic relations for nuclear come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.