noun Pharmacology.
a white, crystalline, bitter, poisonous, central nervous system stimulant, C 3 0 H 3 4 O 1 3 , obtained from the seeds of Anamirta cocculus: used chiefly in the treatment of barbiturate poisoning.

1865–70; < Greek pikr(ós) bitter + -o- + toxin

picrotoxic, adjective
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World English Dictionary
picrotoxin (ˌpɪkrəˈtɒksɪn)
a bitter poisonous crystalline compound formerly used as an antidote for barbiturate poisoning. Formula: C30H34O13

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American Heritage
Medical Dictionary

picrotoxin pic·ro·tox·in (pĭk'rə-tŏk'sĭn)
A bitter crystalline compound derived from the seed of an East Indian woody vine and used as a stimulant, especially in treating barbiturate poisoning.

The American Heritage® Stedman's Medical Dictionary
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