fusion reactor

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun , 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.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a nuclear reactor that uses controlled nuclear fusion to generate energy