| NUC | (physics) a process that alters the energy or structure or composition of atomic nuclei |
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| NUC | (physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements |
| NUC | government agency created in 1974 to license and regulate nuclear power plants |
| NUC | the resonance absorption of a gamma ray by a nucleus identical to the nucleus that emitted the gamma ray |
| NUC | ribonucleic acid found in the nucleolus of the cell |
| NUC | a rocket engine in which a nuclear reactor is used to heat a propellant |
| NUC | a submarine that is propelled by nuclear power |
| NUC | the warhead of a missile designed to deliver an atom bomb |
| NUC | a weapon of mass destruction whose explosive power derives from a nuclear reaction |
| NUC | ship whose motive power comes from the energy of a nuclear reactor |
| NUC | a submarine that is propelled by nuclear power |
| NUC | general term for enzymes that catalyze the hydrolysis of nucleic acid by cleaving chains of nucleotides into smaller units |