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castor bean

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the large, highly poisonous, beanlike seed of the castor-oil plant
the plant itself

Origin: prob. < past use of oil to replace castor

See castor bean in American Heritage Dictionary 4

noun

The castor-oil plant.
The poisonous seed of the castor-oil plant, from which castor oil is obtained.

Origin:

Origin: castor (oil)

Origin: + bean

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castor-oil plant

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