nuclear rocket nuclear rna • nuclear submarine · · · Info · Definitions · Characters · · nuclear rocket · · Text Common · · Latin · · Scripts 14 · · Length 4 · · Syllables Definitions · · · (noun) a rocket engine in which a nuclear reactor is used to heat a propellant. Synonyms: nuclear rocket. · · Noun Definition 1 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 k latin small letter k U+006B 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 t latin small letter t U+0074 u latin small letter u U+0075