neurilemma

The sheath that is formed by a Schwann cell.

The delicate structureless sheath of a nerve-fiber; the primitive sheath; the sheath of Schwann.

The sheath of a nerve-funieulus; the perineurium.

Of the spinal cord, the pia mater.

The delicate outer sheath of a nerve fiber; the primitive sheath.

The perineurium.

The outer membranous covering of a nerve fiber.

thin membranous sheath around a nerve fiber