/ Dictionary / Index D DMT: Meaning and Definition of Find definitions for: DMT Pronunciation: [key] dimethyltryptamine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. DMSO D. Mus. Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language