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Palmic (?), 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.]
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Ricinic (?), a. [L. ricinus castor-oil plant.] (Chem.) Pertaining to, or derived from, castor oil; formerly, designating an acid now called ricinoleic acid.
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Ricinoleic (?), a. (Chem.) Pertaining to, or designating, a fatty acid analogous to oleic acid, obtained from castor oil as an oily substance, C18H34O3 with a harsh taste. Formerly written ricinolic and formerly referred to as palmic.
[1913 Webster +PJC]