castor oil


Definition of 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 Dear Readers: Here are some new uses for castor oil: ● A natural moisturizer for the skin. Washington Post, "Hints From Heloise: An issue with Medicare?," 4 Feb. 2020 Made out of a formula that was discovered loosely placed in an old New England Cookbook, this all-natural shampoo bar is made of just three ingredients: saponified olive oil, coconut oil, and castor oil. Popular Science, "Game-changing shampoo bars for your low-waste lifestyle," 29 Jan. 2020 The Dominican Forbidden Oil is infused with ingredients (including coffee, castor oil and black cumin seed oil) for stimulating the scalp, reviving dry, tired tresses and boosting curl definition while adding softness and shine. Jennifer Ford, Essence, "The Compact," 10 Oct. 2019 Asking for $400,000 for 10% of their company, Stephane Jean-Baptiste and Yve-Car Momperousse are the masterminds behind Kreyol Essence, a line of skin-care products made with castor oil. Gary Levin, USA TODAY, "'Shark Tank' recap: Haitian beauty-product sellers get tough love from Mr. Wonderful," 14 Jan. 2020 There are a lot of myths out there about triggering labor: eating spicy foods, dancing, taking a shot of castor oil, and so on. Ashley Mateo,, "Can Sex Induce Labor? Ob-Gyns Weigh In," 11 Dec. 2019 The brand’s signature V decal is constructed from 100 percent castor oil, while the lining on the inside of the shoe is made from organic cotton and recycled plastic bottles. Wired, "Veja's New Running Shoe Subtracts the Plastic," 19 Sep. 2019 To advance labor, Jessa drank a castor oil smoothie (consult a doctor before doing this) and she was shown climbing up and down stairs to get her contractions to pick up. Amy Haneline, USA TODAY, "Jessa Duggar had an unexpected home birth on her couch," 21 June 2019 Shirley, via email Dear Heloise: For gas-free beans, soak 1 pound of beans overnight with 1 tablespoon of baking soda and 1 tablespoon of castor oil. Heloise, Washington Post, "Hints From Heloise: Keeping guacamole green?," 12 June 2019

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

See More

First Known Use of castor oil

1746, in the meaning defined above

History and Etymology for castor oil

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

Keep scrolling for more

Learn More about castor oil

Time Traveler for castor oil

Time Traveler

The first known use of castor oil was in 1746

See more words from the same year

Statistics for castor oil

Last Updated

14 Feb 2020

Cite this Entry

“Castor oil.” Dictionary, Merriam-Webster, Accessed 22 Feb. 2020.

Keep scrolling for more

More Definitions for castor oil

castor oil


English Language Learners Definition of castor oil

: a thick oil made from a tropical plant and used in the past as a medicine

castor oil

cas·​tor oil | \ ˈka-stər- \

Kids Definition of castor oil

: a thick yellowish liquid that comes from the seeds ( castor beans ) of a tropical herb and is used as a lubricant and as a strong laxative

castor oil


Medical Definition of castor oil

: a pale viscous fatty oil from castor beans used especially as a cathartic or lubricant

Keep scrolling for more

More from Merriam-Webster on castor oil

Rhyming Dictionary: Words that rhyme with castor oil

Spanish Central: Translation of castor oil Encyclopedia article about castor oil

Comments on castor oil

What made you want to look up castor oil? Please tell us where you read or heard it (including the quote, if possible).


See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

More Confusing Words—Quiz

  • cats on impossible timber
  • The magician ______ moved the selected card to the top of the deck.
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!