/ Dictionary / Index P picrotoxin: Meaning and Definition of Find definitions for: pic•ro•tox•in Pronunciation: (pik"ru-tok'sin), [key] — n. Pharm. a white, crystalline, bitter, poisonous, central nervous system stimulant, CHO, obtained from the seeds of Anamirta cocculus: used chiefly in the treatment of barbiturate poisoning. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. picrite Pict Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language