-
- To save this word, you'll need to log in.
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
Meanwhile, panthenol and castor oil calm things down, soothing itchy irritation.
—
Conçetta Ciarlo, Vogue, 1 Feb. 2025
Some people may try natural remedies, like castor oil, to help manage symptoms alongside standard medical treatments.23
There’s limited research exploring the effectiveness of castor oil for psoriasis.
—
Lindsay Curtis, Health, 5 Jan. 2025
Opting for hexane-free castor oil ensures that the product remains pure and safe for use on skin and hair.
—
Sandra Rose Salathe, Flow Space, 16 Dec. 2024
Along with rosemary, its ingredients include tea tree oil (which targets dandruff), moisturizing castor oil, and the calming antioxidant bisabolol.
—
Malia Griggs, Glamour, 18 Sep. 2024
See all Example Sentences for castor oil ![](/dist-cross-dungarees/2025-02-11--16-25-46-ew5nrj/images/svg/redesign/arrow-right-exemplar.svg)
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.
Word History
Etymology
probably from its former use as a substitute for castoreum in medicine
First Known Use
1746, in the meaning defined above
Dictionary Entries Near castor oil
Cite this Entry
“Castor oil.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/castor%20oil. Accessed 12 Feb. 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
Britannica.com: Encyclopedia article about castor oil
Love words? Need even more definitions?
Merriam-Webster unabridged
Share