[lahy-suh-juhn, -jen]
noun Microbiology.
a bacterial cell or strain that has been infected with a temperate virus, one that does not cause destruction of the cell.

1930–35; back formation from lysogenic Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

lysogen ly·so·gen (lī'sə-jən)

  1. An agent capable of inducing lysis.

  2. A bacterium in a state of lysogeny.

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