nuclear; central (to a centre around which something is developed or organised) / nuclear (relating to the nucleus of cells) / nuclear (relating to the nucleus of atoms) / nuclear (involving atomic energy or weapons)

nuclear weapon (explosive device)

meltdown (severe overheating of the core of a nuclear reactor)

(physics) nuclear energy (energy released by a nuclear reaction)

(physics) nuclear fission (nuclear reaction that releases energy)

(physics) nuclear fusion (the combining of the nuclei of small atoms to form the nuclei of larger ones)

nuclear physics (branch of physics that studies the nucleus of the atom)

(physics) nuclear reactor (device in which a controlled nuclear chain reaction is maintained)

radioactive waste (waste containing radioactive chemical elements)

nuclear family (father, mother and children)