- a self-replicating genetic particle postulated to be in the cytoplasm of a cell, as in mitochondria.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- biology any gene other than those carried in the nucleus of a eukaryotic cell, such as a mitochondrial gene
- A self-replicating hereditary structure thought to exist in cytoplasm and function in a manner analogous to, but independent of, chromosomal genes.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.