nuclear in WordNet English dictionary

1. (weapons) deriving destructive energy from the release of atomic energy
   "nuclear war"; "nuclear weapons"; "atomic bombs"
   nuclear  atomic 
   
2. of or relating to or constituting the nucleus of an atom
   "nuclear physics"; "nuclear fission"; "nuclear forces"
   nuclear 
   
3. of or relating to or constituting the nucleus of a cell
   "nuclear membrane"; "nuclear division"
   nuclear 
   
4. constituting or like a nucleus
   "annexation of the suburban fringe by the nuclear metropolis"; "the nuclear core of the congregation"
   nuclear