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.
Infused with castor oil, an ingredient known to reduce breakage, strengthen and grow hair, reach for TGIN’s Miracle Styling Smooth And Sleek Wax Stick for quick slick backs and laid edges. Essence Beauty Editors, Essence, 27 Feb. 2025 Luckily, Air Brow is full of other good-for-brow-hair ingredients, like castor oil, panthenol, and peptides, to keep hairs conditioned while coating them with a natural-looking tint. Kiana Murden, Vogue, 12 Feb. 2025 To make a castor oil pack:20 Soak a clean, soft cloth or cotton pad with a small amount of castor oil. Lindsay Curtis, Health, 5 Jan. 2025 Key Ingredients: Hyaluronic acid, sweet agave extract, willow bark extract, castor oil Size: 0.35 oz. Emily Orofino, Vogue, 21 Oct. 2024 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

Browse Nearby Words

Cite this Entry

“Castor oil.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/castor%20oil. Accessed 25 Mar. 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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