Definify.com
Webster 1913 Edition
Castor oil
Cas′tor oil
(kăs′tẽr oilˊ)
. A mild cathartic oil, expressed or extracted from the seeds of the
Ricinus communis
, or Palma Christi
. When fresh the oil is inodorous and insipid. Castor-oil plant
. Same as
Palma Christi
.