castor-oil

The bean or seed of the castor-oil plant (Ricinus communis, or Palma Christi.)

Of, pertaining to, or derived from, the castor-oil plant (Ricinus communis, or Palma Christi)

A bitter white crystalline alkaloid extracted from the seeds of the castor-oil plant.

n a genus of herb having only one known species: castor-oil plant