Castor oil is a thick yellow oil that is obtained from the seeds of the castor oil plant. It has a veryunpleasant taste and in former times was used as a medicine.
She has gone to bed and had a dose of castor oil.
castor oil in British English
noun
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
castor oil in American English
a colorless or yellowish oil from castor beans, used as a cathartic, lubricant, etc.
Examples of 'castor oil' in a sentence
castor oil
Added now to the other smells of flying, the castor oil, the varnish, the petrol, was the smell of fear.
Haines, Pamela THE GOLDEN LION (2001)
Remember that time when she put castor oil in the coffee, the evening of my first book-club meeting?