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

Origin of lysogen

First recorded in 1930–35; back formation from lysogenic Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

lysogen in Medicine


  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.