castor oil
noun/ˈkɑːstər ɔɪl/
/ˈkæstər ɔɪl/
[uncountable]- a thick yellow oil obtained from a tropical plant and used in the past as a type of medicine, usually as a laxativeWord Originmid 18th cent.: perhaps so named because it succeeded castor (an oily reddish brown substance) in medicinal use.
Want to learn more?
Find out which words work together and produce more natural sounding English with the Oxford Collocations Dictionary app.
Check pronunciation:
castor oil