/ Dictionary / Index R ricinoleic acid: Meaning and Definition of Find definitions for: ric'inole'ic ac'id Pronunciation: [key] — Chem. Chem. a colorless to yellow, viscous, liquid, water-insoluble, unsaturated hydroxyl acid, CHO, occurring in castor oil in the form of the glyceride: used chiefly in soaps and textile finishing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ricinoleic ricinolein Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language