/ Dictionary / Index A Atomic Energy Commission: Meaning and Definition of Find definitions for: Atom'ic En'ergy Commis"sion Pronunciation: [key] a former federal agency (1946–75) created to regulate the development of the U.S. atomic energy program: functions transferred to the Nuclear Regulatory Commission. Abbr.: AEC Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. atomic energy atomic hydrogen Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language