• synonyms

castor bean

  1. the seed of the castor-oil plant.
  2. castor-oil plant.
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Origin of castor bean

1810–20, Americanism; short for castor-oil bean
Related formscas·tor-bean, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for castor bean

Historical Examples of castor bean

  • "Why, it's only what we call the castor-bean, only this is larger," I venture to say.

    Under the Southern Cross

    Elizabeth Robins

  • Horse mint and palm of crystal (Castor-bean) and bullnettle root boiled together will make a cure fer swelling.

  • Some genera like the castor-bean (Ricinus) and Croton are cultivated for their large, showy leaves.

  • The castor-bean and tobacco-plant are also often seen carpeting the ground with emerald.

  • This resemblance is responsible for some of the popular names, such as "castor-bean tick," etc.

    Insects and Diseases

    Rennie W. Doane

British Dictionary definitions for castor bean

castor bean

noun US and Canadian
  1. another name for castor-oil plant
  2. the seed of this plant
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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