/ Dictionary / Index D dimethyltryptamine: Meaning and Definition of Find definitions for: di•meth•yl•tryp•ta•mine Pronunciation: (dī-meth"ul-trip'tu-mēn", -min), [key] — n. Pharm. a hallucinogenic drug, CHN, with an action of short duration. Abbr.: DMT Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dimethyl sulfoxide dimetrodon Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language