a river in W Europe, in N France and W Belgium, flowing NE into the Scheldt River at Ghent. 120 miles (195 km) long.


abbreviation Biochemistry.


a combining form meaning “lysis,” “decomposition,” used in the formation of compound words: lysin.
Also lysi-, lyso-.
Compare -lysis, -lyze, -lyte1.

Origin of lys-

From Greek; see origin at lysis Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for lys

Contemporary Examples of lys

  • Essos is also home to the archipelagos of Braavos and Lys, cities Pentos, Asshai, Yi Ti, and the Shadow Lands.

    The Daily Beast logo
    Game of Thrones for Dummies

    Jace Lacob

    April 13, 2011

Historical Examples of lys

  • You do not mean that you are returning to the Lys de France!

    The Suitors of Yvonne

    Raphael Sabatini

  • From my open window I gazed across the street at the Lys de France.

    The Suitors of Yvonne

    Raphael Sabatini

  • This is thought to be due to the quality of the water in the Lys River.

    Commercial Geography

    Jacques W. Redway

  • He was told to hold the line of the Lys if he could, but not to risk a big fight.


    John French, Viscount of Ypres

  • The last male Lys in the direct line was gathered to his fathers.

    The Angel

    Cyril Arthur Edward Ranger Gull

British Dictionary definitions for lys


combining form

a variant of lyso-
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

lys in Medicine






Variant oflyso-
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.