/ Dictionary / Index L lysi-: Meaning and Definition of Find definitions for: lysi- Pronunciation: [key] var. oflysimeter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lysergic acid diethylamide Lysias 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