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1. (n.) ricin
a white, poisonous, protein powder from the bean of the castor-oil plant.
Etymology: (1895–1900; < NL Ricinus genus name, L: castor-oil plant, lit., tick (parasite))
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| Definition of 'ricin' |
Princeton's WordNet |
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1. (noun) ricin, ricin toxin
a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon
"one milligram of ricin can kill an adult"
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| Definition of 'ricin' |
U.S. National Library of Medicine |
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1. ricin
A protein phytotoxin from the seeds of Ricinus communis, the castor oil plant. It agglutinates cells, is proteolytic, and causes lethal inflammation and hemorrhage if taken internally.
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Definitions of ricin 
