/ Dictionary / Index L lysergic acid diethylamide: Meaning and Definition of Find definitions for: lyser'gic ac'id di•eth•yl•am'ide Pronunciation: (dī-eth"u-lam'īd, -eth'u-lu-mīd"), [key] — Pharm. Pharm. See(def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lysergic acid lysi- Related Content Daily Word Quiz: wary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language