nuclear envelope(redirected from Karyotheca)
Also found in: Dictionary, Medical.
nuclear envelope[′nü·klē·ər ′en·və‚lōp]
(cell and molecular biology)
A structure consisting of two membranes that surrounds the nucleus; the outermost membrane is continuous with the rough endoplasmic reticulum.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.