nuclear envelope

noun Biology.

1. the double membrane surrounding the nucleus within a cell.

n.

1. nuclear membrane

n.

1. The double-layered membrane enclosing the nucleus of a cell.nuclear envelope

1. The double-layered membrane enclosing the nucleus of a eukaryotic cell. The nuclear envelope has pores that allow the passage of materials into and out of the nucleus. Also called nuclear membrane

1. See nuclear envelope.