Thermonuclear Definition
thûrmō-no͝oklē-ər, -nyo͝o-
adjective
Designating or of a reaction in which isotopes of a light element, esp. hydrogen, fuse at temperatures of millions of degrees into heavier nuclei.
Webster's New World
Designating, of, or employing the heat energy released in nuclear fusion.
Thermonuclear reactor.
Webster's New World
Relating to or characterized by the use of weapons that employ nuclear fusion, especially as distinguished from those that employ only nuclear fission.
Thermonuclear war.
American Heritage
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