The adj nuclear has 4 senses (first 4 from tagged texts)
1. (13) nuclear, atomic -- ((weapons) deriving destructive energy from the release of atomic energy; "nuclear war"; "nuclear weapons"; "atomic bombs")
2. (8) nuclear -- (of or relating to or constituting the nucleus of an atom; "nuclear physics"; "nuclear fission"; "nuclear forces")
3. (1) nuclear -- (of or relating to or constituting the nucleus of a cell; "nuclear membrane"; "nuclear division")
4. (1) nuclear -- (constituting or like a nucleus; "annexation of the suburban fringe by the nuclear metropolis"; "the nuclear core of the congregation")