/ Dictionary / Index L Lys: Meaning and Definition of Find definitions for: Lys Pronunciation: (lēs), [key] — n. a river in W Europe, in N France and W Belgium, flowing NE into the Scheldt River at Ghent. 120 mi. (195 km) long. Lys Pronunciation: [key] — Biochem. Biochem. lysine. lys- Pronunciation: [key] a combining form meaning “lysis,” “decomposition,” used in the formation of compound words: lysin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lyrist Lysander 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