castor bean Hear it!

castor bean definition

☆ castor bean

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

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

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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