01 a. Of, pertaining to, or derived from, the castor-oil plant (Ricinus communis, or Palma Christi) and other species of the family Euphorbiaceae…
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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).(Chem.) [Obsoles.] Also: ricinoleic