蓖麻

[ noun ]
large shrub of tropical Africa and Asia having large palmate leaves and spiny capsules containing seeds that are the source of castor oil and ricin; widely naturalized throughout the tropics
<noun.plant>

Palma Christi \Pal"ma Chris"ti\ [L., palm of Christ.] (Bot.)
A plant ({Ricinus communis}) with ornamental peltate and
palmately cleft foliage, growing as a woody perennial in the
tropics, and cultivated as an herbaceous annual in temperate
regions; -- called also {castor-oil plant}. [Sometimes
corrupted into {palmcrist}.]


Palmic \Pal"mic\, a. [Cf. F. palmique.] (Chem.)
Of, pertaining to, or derived from, the castor-oil plant
({Ricinus communis}, or {Palma Christi}) and other species of
the family {Euphorbiaceae}; -- formerly used to designate an
acid now called {ricinoleic} acid (d-12-hydroxyoleic acid,
{C18H34O3}). [Obsoles.]


ricinoleic acid \ric`in*o"le*ic ac"id\, n. (Chem.)
An organic acid ({C18H34O3}) obtained from the castor-oil
plant ({Ricinus communis}, or {Palma Christi}) and other
species of the family {Euphorbiaceae}; chemicaly it is
d-12-hydroxyoleic acid
({CH3(CH2)5.CH(OH).CH2.CH=CH.(CH2)7COOH}). Formerly called
{palmic acid}.
[1913 Webster +PJC]


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}.


Castor bean \Cas"tor bean`\ (Bot.)
The bean or seed of the castor-oil plant ({Ricinus communis},
or {Palma Christi}.)