LysPronunciation: (lēs), [key]
a river in W Europe, in N France and W Belgium, flowing NE into the Scheldt River at Ghent. 120 mi. (195 km) long.
a combining form meaning “lysis,” “decomposition,” used in the formation of compound words: lysin. Also,lysi-,lyso-.
Cf. -lysis, -lyze, -lyte.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.