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Definition

noun

The space or gap between the inner and outer membranes surrounding the nucleus

Supplement

The perinucluear space of most cells is 20-40nm wide. Since the endoplasmic reticulum is contiguous to nuclear membrane the endoplasmic reticulum lumen is therefore contiguous to perinuclear space as well.

Word origin: peri- (surrounding) + nuclear (nucleus) + space

Also called:

• perinuclear cisterna
• nuclear envelope lumen
• Cisterna caryothecae

See also:

• perinuclear
• nuclear envelope
• nucleus