castor bean

the seed of the castor-oil plant.

Origin of castor bean

1810–20, Americanism; short for castor-oil bean

cas·tor-bean, adjective

This resemblance is responsible for some of the popular names, such as "castor-bean tick," etc.

Insects and Diseases |Rennie W. Doane
"Why, it's only what we call the castor-bean, only this is larger," I venture to say.

Under the Southern Cross |Elizabeth Robins
Some genera like the castor-bean (Ricinus) and Croton are cultivated for their large, showy leaves.

Elements of Structural and Systematic Botany |Douglas Houghton Campbell
Horse mint and palm of crystal (Castor-bean) and bullnettle root boiled together will make a cure fer swelling.

Slave Narratives, Oklahoma |Various

The castor-bean and tobacco-plant are also often seen carpeting the ground with emerald.

Early Western Travels 1748-1846, v. 27 |Various

castor bean

another name for castor-oil plant

the seed of this plant