castor oil


: 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 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. Marissa Evans, Los Angeles Times, 2 Nov. 2023 There are also claims that castor oil helps promote eyelash and eyebrow growth, but no studies to date have tested the theory. Katie Camero, NBC News, 5 Aug. 2023 This oil is fortified with aloe vera, which conditions and softens the hair, while hydrating babassu oil and soothing castor oil fuse the formula together to encourage sleeker and stronger strands. Alyssa Brascia, Peoplemag, 28 Oct. 2023 There’s even castor oil and panthenol to keep your brow hairs in tip-top shape. Kiana Murden, Vogue, 30 Aug. 2023 The mascara is chock full of omega fatty acid-rich castor oil for lusher, shinier lashes. Ali Faccenda, Peoplemag, 18 Apr. 2023 Lay them on top of each other to create a castor oil pack. Kaitlin Vogel, Health, 29 Sep. 2023 There's just something about a foaming face wash that feels decadent and relaxing, and this one certainly delivers, thanks to ingredients like glycerin and castor oil to nourish the skin and salicylic acid to clear breakouts. Lindsey Metrus, Peoplemag, 7 Sep. 2023 In addition, the bioceramic material that is used for the case, bezel, pin buckle, and loops is a unique blend of two-thirds ceramic and one-third bio-sourced material derived from castor oil. Rachel Cormack, Robb Report, 12 Sep. 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'castor oil.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


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

Dictionary Entries Near castor oil

Cite this Entry

“Castor oil.” Dictionary, Merriam-Webster, Accessed 7 Dec. 2023.

Kids Definition

castor oil

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

Medical Definition

castor oil

: 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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