n. 蓖麻子油

[ noun ]
a purgative extracted from the seed of the castor-oil plant; used in paint and varnish as well as medically
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Castor oil \Cas"tor oil\ (k[a^]s"t[~e]r oil`).
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}.