nuclear fusion nuclear fuel • nuclear fusion reaction · · · Info · Definitions · Synonyms · Characters · · nuclear fusion · · Text Common · · Latin · · Scripts 14 · · Length 4 · · Syllables Definitions · · · (noun) a nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy. Synonyms: fusion, nuclear fusion, nuclear fusion reaction. · · Noun Definition 1 Synonyms · · · fusion · · Synonym 1 nuclear fusion reaction · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075