Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biochemistry  A bacteriolytic (orantibiotic )enzyme found in manyanimal secretions , and inegg white .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an enzyme found in saliva and sweat and tears that destroys the cell walls of certain bacteria
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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								Interestingly, lysozyme is also found in tears, so in theory you could fine your Cabernets by weeping into them. Wine, allergies, histamines and sulfites - reactions from an allergist | Dr Vino's wine blog 2010 
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								NMR spectroscopy of the protein lysozyme in their experimental new superconducting spectrometer, and published the first paper on that subject. 
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								Presented with the medical term "lysozyme," he blurted out: "May I please have all the information on this word?" USATODAY.com News 2011 
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								Presented with the medical term "lysozyme," he blurted out: "May I please have all the information on this word?" USATODAY.com News 2011 
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								Tears are salt, as are all body fluids, and also contain a protein called lysozyme, which has the ability to kill bacteria and thus lend tears a disinfecting quality. The Human Brain Asimov, Isaac 1963 
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								The speller with the most commanding stage presence continued to be Surjo Bandyopadhyay of Lusby, Md., who heard the medical word "lysozyme" and blurted out: "May I please have all the information on this word?" The Seattle Times 2011 
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								The speller with the most commanding stage presence continued to be Surjo Bandyopadhyay of Lusby, Md., who heard the medical word "lysozyme" and blurted out: "May I please have all the information on this word?" The Seattle Times 2011 
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								These contain a chemical called "lysozyme" which functions as an anti-bacterial and protects our eyes from infection. 
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								Fig. 3A and B) revealed that MstnPP soluble aggregates exhibit a morphology and size similar to that documented for amyloid protofibrils from a number of other proteins such as lysozyme Characterisation of MstnPP soluble aggregates by negative-stain transmission electron microscopy (TEM) and ThT binding. PLoS ONE Alerts: New Articles Carlene S. Starck et al. 2010 
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								Fig. 3A and B) revealed that MstnPP soluble aggregates exhibit a morphology and size similar to that documented for amyloid protofibrils from a number of other proteins such as lysozyme Characterisation of MstnPP soluble aggregates by negative-stain transmission electron microscopy (TEM) and ThT binding. PLoS ONE Alerts: New Articles Carlene S. Starck et al. 2010 
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