a. [ Ricinoleic + elaidic. ] Pertaining to, or designating, an isomeric modification of ricinoleic acid obtained as a white crystalline solid. [ 1913 Webster ]

n. (Chem.) The glycerin salt of ricinelaidic acid, obtained as a white crystalline waxy substance by treating castor oil with nitrous acid. [ 1913 Webster ]

a. [ L. ricinus castor-oil plant. ] (Chem.) Pertaining to, or derived from, castor oil; formerly, designating an acid now called ricinoleic acid. [ 1913 Webster ]

n. [ L. ricinus castor-oil plant. ] (Chem.) A bitter white crystalline alkaloid (C8H8N2O2) extracted from the seeds of the castor-oil plant (Ricinus communalis). Called also ricidine. Ingestion may cause vomiting and various other toxic reactions, including liver and kidney damage, convulsions, hypotension, and death. [ 1913 Webster +PJC ]

n. (Chem.) A salt of ricinoleic acid; -- formerly called palmate. [ 1913 Webster ]

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 ]

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 ]

n. [ L. ricinus castor-oil plant + oleum oil. ] (Chem.) The glycerin salt of ricinoleic acid, occuring as a characteristic constituent of castor oil; -- formerly called palmin. [ 1913 Webster ]

a. (Chem.) Ricinoleic. [ 1913 Webster ]

‖n. [ L., the castor-oil plant. ] (Bot.) A genus of plants of the Spurge family, containing but one species (Ricinus communis), the castor-oil plant. The fruit is three-celled, and contains three large seeds from which castor oil is expressed. See Palma Christi. [ 1913 Webster ]