noun Immunology, Biochemistry.
an antibody causing the disintegration of erythrocytes or bacterial cells.

1895–1900; lys- + -in2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
lysin (ˈlaɪsɪn)
any of a group of antibodies or other agents that cause dissolution of cells against which they are directed

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

lysin ly·sin (lī'sĭn)

  1. An antibody that is capable of causing the destruction or dissolution of red blood cells, bacteria, or other cellular elements.

  2. A substance that causes lysis.

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