castor oil

noun

: a pale viscous fatty oil from castor beans used especially as a cathartic and as a lubricant and plasticizer

Examples of castor oil in a Sentence

Recent Examples on the Web

Since using it, she’s noticed considerably less hair fall, thanks to strengthening castor oil and various plant extracts that help provide a healthy environment for hair to thrive. —Alanna Martine Kilkeary, Glamour, 20 Nov. 2024

Simply add a few drops of this gentle formula to your bath and soak your cares away while moisturizing your skin with aloe, Vitamin E oil, and castor oil. —Christina Shepherd McGuire, Better Homes & Gardens, 5 Nov. 2024

If your hair is thick or coarse, choose a heavier oil that locks in hydration (such as those that contain coconut oil, castor oil, or olive oil). —Malia Griggs, Glamour, 25 July 2024

The blend of castor oil, Vitamin E, and organic coconut oil ensures lasting hydration, while the cream creates the most stunning dewy finish. —Kat Romero, Rolling Stone, 25 Sep. 2024

Word History

Etymology

probably from its former use as a substitute for castoreum in medicine

First Known Use

1746, in the meaning defined above

Kids Definition

castor oil

noun

: a pale thick oil obtained from castor beans and used chiefly as a lubricant or a laxative

Medical Definition

castor oil

noun

: a pale viscous fatty oil from castor beans used especially as a cathartic or lubricant