/ Dictionary / Index K kMc: Meaning and Definition of Find definitions for: kMc Pronunciation: [key] kilomegacycle; kilomegacycles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. km K meson Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language