- the central region in a prokaryotic cell, as a bacterium, that contains the chromosomes and that has no surrounding membrane.
- resembling a nucleus.
Origin of nucleoid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- Resembling a nucleolus.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.