Definitions for nuclear envelope

This page provides all possible meanings and translations of the word nuclear envelope

U.S. National Library of Medicine

  1. Nuclear Envelope

    The membrane system of the CELL NUCLEUS that surrounds the nucleoplasm. It consists of two concentric membranes separated by the perinuclear space. The structures of the envelope where it opens to the cytoplasm are called the nuclear pores (NUCLEAR PORE).


  1. Nuclear membrane

    A nuclear membrane, also known as the nuclear envelope, nucleolemma or karyotheca, is the double lipid bilayer membrane which surrounds the genetic material and nucleolus in eukaryotic cells. The nuclear membrane consists of two lipid bilayers—the inner nuclear membrane, and the outer nuclear membrane. The space between the membranes is called the perinuclear space, a region contiguous with the lumen of the endoplasmic reticulum. It is usually about 20–40 nm wide. The nuclear membrane has many small holes called nuclear pores that allow material to move in and out of the nucleus.

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