castor oil

American  

noun

castor oils plural

1. a colorless to pale yellow, viscid liquid, usually obtained from the castor bean by a pressing process: used as a lubricant, in the manufacture of certain soaps and creams, and in medicine chiefly as a cathartic.

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castor oil British  

noun

1. a colourless or yellow glutinous oil obtained from the seeds of the castor-oil plant and used as a fine lubricant and as a cathartic

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Other Word Forms

Noun Inflected Forms

• castor oils
  plural

Etymology

Origin of castor oil

1740–50; castor (perhaps variant spelling of caster ) + oil; perhaps so called because of its purgative effect

Example Sentences

See Examples For:

castor oil

The modified Arabidopsis overcame metabolic bottlenecks and produced significant amounts of an oil similar to castor oil that it doesn't naturally produce.

From Science Daily ● Apr. 30, 2024

Newer products include a hair strengthening collection with biotin and Jamaican castor oil, and a wig care collection that uses apple cider vinegar to remove build-up from weaves and wigs.

From Los Angeles Times ● Nov. 2, 2023

"It is made from British wool and a polymer of cashew nut and castor oil," said Mr Kershaw.

From BBC ● Nov. 9, 2022

I even tried some of the suggestions you have offered: duct tape, tea tree oil, castor oil, iodine and vinegar soaks.

From Seattle Times ● Jan. 26, 2022

They burned a lot of fuel, and they used castor oil, which leaked and splattered all over the cockpit after a few flights.

From "A Thousand Sisters" by Elizabeth Wein