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[lahy-suh-zahym] /ˈlaɪ səˌzaɪm/
noun, Biochemistry.
an enzyme that is destructive of bacteria and functions as an antiseptic, found in tears, leukocytes, mucus, egg albumin, and certain plants.
Origin of lysozyme
First recorded in 1920-25; lyso- + (en)zyme Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for lysozyme


an enzyme occurring in tears, certain body tissues, and egg white: destroys bacteria by hydrolysing polysaccharides in their cell walls
Word Origin
C20: from lyso- + (en)zyme
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
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Word Origin and History for lysozyme

1922, from lyso- + suffix from enzyme.

Online Etymology Dictionary, © 2010 Douglas Harper
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lysozyme in Medicine

lysozyme ly·so·zyme (lī'sə-zīm')
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. Also called muramidase.

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