atomic energy commission atomic energy • atomic explosion · · · Info · Definitions · Characters · · atomic energy commission · · Text Common · · Latin · · Scripts 24 · · Length 9 · · Syllables Definitions · · · (noun) a former executive agency (from 1946 to 1974) that was responsible for research into atomic energy and its peacetime uses in the United States. Synonyms: Atomic Energy Commission, AEC. · · 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 g latin small letter g U+0067 i latin small letter i U+0069 m latin small letter m U+006D 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 t latin small letter t U+0074 y latin small letter y U+0079