castor-oil plant

[ kas-ter-oil, kah-ster- ]
/ ˈkæs tərˈɔɪl, ˈkɑ stər- /

noun

a tall plant, Ricinus communis, of the spurge family, cultivated for its ornamental foliage and having poisonous seeds that are the source of castor oil.
Also called castor bean.

Origin of castor-oil plant

First recorded in 1835–45

British Dictionary definitions for castor-oil plant

castor-oil plant

noun

a tall euphorbiaceous Indian plant, Ricinus communis, cultivated in tropical regions for ornament and for its poisonous seeds, from which castor oil is extracted Also called (US and Canadian): castor bean