ricin Definition in the Cambridge English Dictionary
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Definition of “ricin” - English Dictionary

Definition of "ricin" - British English Dictionary

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ricinnoun [U]

uk   us   /ˈraɪ.sɪn/
a ​poisonouspowderobtained from the ​bean of the castoroilplant
(Definition of ricin from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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