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An enzyme occurring naturally in egg white, human tears, saliva, and other body fluids, capable of destroying the cell walls of certain bacteria and thereby acting as a mild antiseptic.


(Biochemistry) an enzyme occurring in tears, certain body tissues, and egg white: destroys bacteria by hydrolysing polysaccharides in their cell walls
[C20: from lyso- + (en)zyme]


(ˈlaɪ səˌzaɪm)

an enzyme that is destructive of bacteria and functions as an antiseptic, found in tears, leukocytes, mucus, egg albumin, and certain plants.
[1920–25; lyso- + (en) zyme]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.lysozyme - an enzyme found in saliva and sweat and tears that destroys the cell walls of certain bacteria
enzyme - any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions
References in periodicals archive ?
ASTM E1105, Standard Test Method for Field Determination of Water Penetration of Installed Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform or Cyclic Static Air Pressure Difference
Directive 89/107/EEC, however, only covers and authorises two substances - E1103 (invertase) and E1105 (lysozyme) - recalled Avril Doyle (EPP-ED, Ireland), the European Parliament's rapporteur on this dossier.
Protocols relied on ASTM standards such as ASTM E331 (ASTM 2000a) and ASTM E1105 (ASTM 2000b) and supplemented those methods with new protocols tailored to meet project goals.