/ Dictionary / Index P psychotogen: Meaning and Definition of Find definitions for: psy•chot•o•gen Pronunciation: (sī-kot'u-jun, -jen"), [key] — n. a substance that causes a psychotic reaction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. psychotic psychotomimetic Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language