castor bean

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Ricinus

(ris'i-nŭs),
A genus of plants (family Euphorbiaceae) with one species, Ricinus communis, the castor oil plant, the source of castor oil; the leaves are said to be a galactagogue.
Synonym(s): castor bean
[L.]

castor bean

n.
1. The castor-oil plant.
2. The poisonous seed of the castor-oil plant, from which castor oil is obtained.

castor bean

Herbal medicine
The kernel of the seeds of Ricinus communis, which contain the highly toxic ricin and ricinine.

cas·tor bean

(kast'ŏr bēn)
Herbal agent made from the seed of Ricinus communis; widely used as a cathartic laxative; overdosage can produce gastrointestinal problems.
Synonym(s): Mexico seed, pei-ma.

castor bean