castor-oil

castor oil

noun
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.
Also called ricinus oil.


Origin:
1740–50; castor (perhaps variant spelling of caster) + oil; perhaps so called because of its purgative effect

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World English Dictionary
castor oil
 
n
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 10th Edition
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American Heritage
Medical Dictionary

castor oil cas·tor oil (kās'tər)
n.
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
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