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castor bean

noun

  1. the seed of the castor-oil plant.


castor bean

noun

  1. another name for castor-oil plant
  2. 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
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Other Words From

  • castor-bean adjective
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Word History and Origins

Origin of castor bean1

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

“Those, over there, are actually castor bean stalks,” Kleckner said as we zoomed past.

Around 90% of oil is valuable for industrial uses in crops like castor beans, Bates said.

He was arrested after agents found a plastic bag with castor beans along with a handwritten recipe for extracting ricin from the beans, according to an FBI affidavit.

She later admitted to making the ricin - a poison made from the waste material left over from castor beans processing - at her Quebec home, and placing it into an envelope with the letter.

From BBC

The researchers looked at a species of tick called the castor bean tick, which is common across Europe.

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Castor and Polluxcastoreum