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[ep-uh-sohm] /ˈɛp əˌsoʊm/
noun, Genetics.
bacterial DNA that is extrachromosomal and that may replicate autonomously as a plasmid or become incorporated into the chromosome and replicate with it.
Origin of episome
First recorded in 1930-35; epi- + -some3
Related forms
episomal, adjective
episomally, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for episome


a unit of genetic material (DNA) in bacteria, such as a plasmid, that can either replicate independently or can be integrated into the host chromosome
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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episome in Medicine

episome ep·i·some (ěp'ĭ-sōm')
A genetic particle within certain cells, especially bacterial cells, that can exist either autonomously in the cytoplasm or as part of a chromosome.

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