/ Dictionary / Index Q quantum chemistry: Meaning and Definition of Find definitions for: quan'tum chem'istry Pronunciation: [key] the application of quantum mechanics to the study of chemical phenomena. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. quantum quantum chromodynamics Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language