/ Dictionary / Index Q quantal: Meaning and Definition of Find definitions for: quan•tal Pronunciation: (kwon'tl), [key] — adj. Physics. of or pertaining to quanta or quantum mechanics. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: quantal (Thesaurus) quanta quantic Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language