castor bean

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noun

Origin of castor bean

1810–20, Americanism; short for castor-oil bean

Related forms

cas·tor-bean, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for castor bean

castor bean

noun US and Canadian

another name for castor-oil plant
the seed of this plant

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012