/ Dictionary / Index P psychotoxic: Meaning and Definition of Find definitions for: psy•cho•tox•ic Pronunciation: (sī"kō-tok'sik), [key] — adj. Pharm. toxic or harmful to the mind or personality. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. psychotomimetic psychotronic Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language