adjective
- of, relating to, or involving a thermonuclear reaction: thermonuclear power.
adjective
- involving nuclear fusiona thermonuclear reaction; thermonuclear energy
- involving thermonuclear weaponsa thermonuclear war
adj.1938 with reference to stars, 1953 of weapons (technically only to describe the hydrogen bomb), from thermo- + nuclear.
- Relating to the fusion of atomic nuclei at high temperatures or to the energy produced in this way.
- Relating to weapons based on nuclear fusion, especially as distinguished from those based on nuclear fission.
A term referring to devices that use nuclear fusion, the fusion of atomic nuclei, to produce energy at very high temperatures. (See hydrogen bomb.)