/ Dictionary / Index S sebacic acid: Meaning and Definition of Find definitions for: sebac'ic ac'id Pronunciation: [key] — Chem. Chem. a crystalline, slightly water-soluble, dibasic acid, CHO, usually obtained from castor oil: used chiefly in the manufacture of plasticizers and resins. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sebacic Sebastian Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language