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
castor-oil plant in American English
(ˈkæstərˈɔɪl)
a tropical plant (Ricinus communis) of the spurge family, with seeds (castor beans) from which castor oil is extracted