karyotheca


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Related to karyotheca: nucleolus, nucleus, nuclear envelope

karyotheca

 [kar″e-o-the´kah]
the nuclear membrane.

nu·cle·ar en·ve·lope

the double membrane at the boundary of the nucleoplasm; it has regularly spaced pores covered by a disclike nuclear pore complex and a space or cisterna about 150 Ǻ wide between the two membranes; the outer membrane is continuous at intervals with the rough endoplasmic reticulum.