castor oilcastor oil
a colorless or yellowish oil from castor beans, used as a cathartic, lubricant, etc.
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.
Origin of castor oilPossibly from a former use as a substitute for castor in medicine.
(plural castor oils)
- Made of or relating to castor oil.