Also found in: Medical, Encyclopedia.
A self-replicating hereditary structure once thought to exist in cytoplasm and function in a manner analogous to, but independent of, chromosomal genes.
plas′ma·gen′ic (-jē′nĭk, -jĕn′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Biology) biology any gene other than those carried in the nucleus of a eukaryotic cell, such as a mitochondrial gene
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014