ricinoleic acid


ri·​cin·​ole·​ic acid ˌrī-sə-nō-ˈlē-ik- How to pronounce ricinoleic acid (audio)
: an oily unsaturated hydroxy fatty acid C18H34O3 that occurs in castor oil as a glyceride and yields esters important as plasticizers

Example Sentences

Recent Examples on the Web Additionally, 90% of castor oil is made up of the fatty acid ricinoleic acid. Elle.com, ELLE, 6 Dec. 2022 Overall, limited research shows that the ricinoleic acid in castor oil may have antimicrobial1 and anti-inflammatory2 properties (which could, theoretically, be helpful for skin conditions like eczema and psoriasis). ​jessica Migala, SELF, 28 Jan. 2022 Castor oil, which contains a moisturizing fatty acid called ricinoleic acid, is most commonly applied topically to skin and hair for potential beauty perks—from glowing skin to hair growth (more on that below). ​jessica Migala, SELF, 28 Jan. 2022 The oil’s ricinoleic acid increases scalp blood flow, which can promote healthier hair and growth while also cutting down on inflammation. Madge Maril, Harper's BAZAAR, 10 May 2021 Thanks to its high concentration of ricinoleic acid and vitamin E, as well as Omega-6 and Omega-9 fats, lubricant has long been thought to aid in hair and eyelash growth. Kristi Kellogg, Vogue, 23 Oct. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ricinoleic acid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


Latin ricinus + English oleic acid

First Known Use

1847, in the meaning defined above

Time Traveler
The first known use of ricinoleic acid was in 1847

Dictionary Entries Near ricinoleic acid

Cite this Entry

“Ricinoleic acid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ricinoleic%20acid. Accessed 27 Jan. 2023.

Medical Definition

ricinoleic acid

ri·​cin·​ole·​ic acid ˌrīs-ᵊn-ō-ˌlē-ik-, ˌris-, -ˌlā- How to pronounce ricinoleic acid (audio)
: an oily unsaturated hydroxy fatty acid C18H34O3 that occurs in castor oil as a glyceride

More from Merriam-Webster on ricinoleic acid

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