/ Dictionary / Index L lysogen: Meaning and Definition of Find definitions for: ly•so•gen Pronunciation: (lī'su-jun, -jen"), [key] — n. Microbiol. a bacterial cell or strain that has been infected with a temperate virus, one that does not cause destruction of the cell. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lysocline lysogenesis Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language