/ Dictionary / Index P psychochemical: Meaning and Definition of Find definitions for: psy•cho•chem•i•cal Pronunciation: (sī"kō-kem'i-kul), [key] — adj. pertaining to chemicals or drugs that affect the mind or behavior. —n. any such substance, esp. when used as a chemical warfare agent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. psychobiology psychodelic Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language