Definition of castor bean
: the very poisonous seed of the castor-oil plant;
also
: castor-oil plant
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Recent Examples of castor bean from the Web
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In addition to the merino wool upper, the shoelaces are composed of recycled plastic bottles and the insoles are derived from castor bean oil.
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Barbara Eychaner, Carmichael Bee garden writer Debbie Arrington: That’s a Japanese aralia, also known as false castor bean.
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The most attractive bean is the most deadly: castor bean or Ricinus.
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The final version of the Tree shoe has laces made from recycled plastic bottles, an insole derived from castor beans, and eyelets based on plant starch.
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Unlike the look-alike (and poisonous) castor bean, Fatsia is not toxic to cats, dogs or people.
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According to the Centers for Disease Control and Prevention, ricin is a toxic, biological agent found in the waste from processing castor beans into castor oil, and exposure can occur through inhalation, ingestion or through the skin or eyes.
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Police found castor beans -- which naturally produce ricin -- at Lynch’s home.
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Ricin can be made from the waste material left over from processing castor beans.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'castor bean.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of castor bean
1819
Medical Dictionary
medical Definition of castor bean
: the very poisonous seed of the castor-oil plant;
also
: castor-oil plant
Learn More about castor bean
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Britannica.com: Encyclopedia article about castor bean
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