castor oil

• castor-oil

From its medicinal use in succession to castor.

• (Received Pronunciation) IPA^(key): /ˈkɑː.stə ˌɔɪl/
• (General American) IPA^(key): /ˈkæ.stɚ ˌɔɪl/

castor oil (countable and uncountable, plural castor oils)

1. The pale yellow vegetable oil extracted from the castor bean; used as a laxative and an industrial lubricant.
   • 2020, Avni Doshi, Burnt Sugar, Hamish Hamilton, page 127:

     Every six months, spoonfuls of castor oil were administered to combat constipation.

• ricinus oil

• castor oil plant

• castoreum

• ricinoleic acid

• “castor oil”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
• “castor oil”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.