蓖麻 Traditional form: 蓖麻 Pinyin (reading): bìmá Definitions: castor-oil plant Characters: 蓖 - the castor-oil plant; Ricinus commumis 麻 - hemp, flax, sesame; numb Traditional characters: 蓖 - the castor-oil plant; Ricinus commumis 麻 - hemp, flax, sesame; numb