WordReference Random House Unabridged Dictionary of American English © 2020
pic•ro•tox•in  (pik′rə toksin),USA pronunciation n. [Pharm.]
  1. Drugsa white, crystalline, bitter, poisonous, central nervous system stimulant, C30H34O13, obtained from the seeds of Anamirta cocculus: used chiefly in the treatment of barbiturate poisoning.
pic′ro•toxic, adj. 
  • Greek pikr(ós) bitter + -o- + toxin
  • 1865–70

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