castor oil

noun

1. 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.

castor oil

noun

1. 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

Word History and Origins

Origin of castor oil¹

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

Example Sentences

Ricin is a highly toxic poison naturally derived from castor oil plants.

From BBC

The modified Arabidopsis overcame metabolic bottlenecks and produced significant amounts of an oil similar to castor oil that it doesn't naturally produce.

From Science Daily

Look for products that contain petroleum jelly, castor oil and glycerin, Rogers said.

From Seattle Times

Newer products include a hair strengthening collection with biotin and Jamaican castor oil, and a wig care collection that uses apple cider vinegar to remove build-up from weaves and wigs.

From Los Angeles Times

In the second episode, boys spike the punch and the future Pink Ladies retaliate by putting castor oil in the booze.

From New York Times