Give out steady light without flame
lights glowed from the windows of the high-street shops
A soft-bodied beetle with luminescent organs in the abdomen, especially the larvalike wingless female which emits light to attract the flying male
A novelty item consisting of a plastic tube containing two chemicals which combine when the tube is bent, so producing a luminescent glow
A tall rudbeckia with globular yellow flower heads
(In a low-pressure discharge tube) a luminous region in the vicinity of the cathode, from which it may be separated by the Crookes dark space.
A luminous sparkless electrical discharge from a pointed conductor in a gas at low pressure
Brightness of the night sky in a built-up area as a result of light pollution