- a colorless to pale yellow, viscid liquid, usually obtained from the castor bean by a pressing process: used as a lubricant, in the manufacture of certain soaps and creams, and in medicine chiefly as a cathartic.
Origin of castor oil
Also called ricinus oil.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for castor oil
She gave it castor-oil, and it recovered, but has never sung since that time.
Kiki (the castor-oil bean) is a kind of fruit sowed in furrows.
They took ipecacuanha, castor-oil, or sulphate of soda, as if they enjoyed them.Indo-China and Its Primitive People
When I come back you must reward it with an anointing of tallow or castor-oil.Letters of Anton Chekhov
In these larger European motors, castor-oil is used largely for lubrication.Aviation Engines
Victor Wilfred Pag
- a colourless or yellow glutinous oil obtained from the seeds of the castor-oil plant and used as a fine lubricant and as a cathartic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- A colorless or pale yellowish oil extracted from the seeds of the castor-oil plant, used pharmaceutically as a laxative and skin softener and industrially as a lubricant.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.