fusion reactor

Noun

 * 1) (theoretically), a thermonuclear reactor that relies on the controlled fusion of light elements into heavier elements, with the attendant release of enormous amounts of energy. In practice, satisfactory results have not yet been achieved.

Translations

 * Finnish:
 * German:
 * Hungarian:
 * Romanian: reactor de fuziune
 * Russian: термоя́дерный реа́ктор