/ Dictionary / Index N Nuclear Regulatory Commission: Meaning and Definition of Find definitions for: Nu'clear Reg'ulatory Commis"sion Pronunciation: [key] — U.S. Govt. U.S. Govt. an independent agency, created in 1975, that licenses and regulates the nonmilitary use of nuclear energy. Abbr.: NRC Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nuclear reactor Nuclear Test-Ban Treaty Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language