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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This curl-enhancing mousse features moisture-boosting marshmallow root and castor oil, making styling coily hair a smooth experience. Natasha Marsh, Allure, 7 Apr. 2025 Remedy that immediately with this dreamy and mega-hydrating lip balm made with peppermint, rosehip, and castor oil. Perrie Samotin, Glamour, 31 Mar. 2025 Oils such as castor oil were used as a treatment for headlice. Emilie Le Beau Lucchesi, Discover Magazine, 14 Feb. 2025 There also is no recommendation on what type of castor oil to buy. Sherri Gordon, Health, 26 Mar. 2025 See All Example Sentences for castor oil

Word History

Etymology

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

First Known Use

1746, in the meaning defined above

Time Traveler
The first known use of castor oil was in 1746

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Cite this Entry

“Castor oil.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/castor%20oil. Accessed 24 Apr. 2025.

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

More from Merriam-Webster on castor oil

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