Definition of ricin
: a poisonous protein in the castor bean
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Recent Examples of ricin from the Web
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Tiny amounts of ricin can kill an adult if eaten, injected or inhaled.
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He is accused of having started procuring material, including a large quantity of seeds needed for the creation of ricin, online in mid-May.
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Authorities found explosive powder and tutorials on how to make explosives and poison from materials such as ricin, the official said.
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The court filing does not state what authorities believe Gibbs intended to do with the ricin.
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Investigators found the ricin in a container that was double wrapped with plastic bags.
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Investigators also found castor beans, which naturally produce ricin, and a jar labeled as containing botulism.
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The tip of the umbrella had been laced with ricin, a deadly poison, and Markov later died.
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News sources are now reporting that this message has tested positive for ricin.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ricin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of ricin
Latin ricinus castor-oil plant
Medical Dictionary
medical Definition of ricin
: a poisonous protein in the castor bean
Learn More about ricin
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Britannica.com: Encyclopedia article about ricin
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