/ Dictionary / Index L lysergic acid: Meaning and Definition of Find definitions for: ly•ser'gic ac'id Pronunciation: (lī-sûr'jik, li-), [key] — Chem. Chem. a crystalline solid, CHNO, obtained from ergot or synthesized: used in the synthesis of LSD. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Lysenkoism lysergic acid diethylamide Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language