Glow-in-the-dark may refer to: Bioluminescence - the production and emission of light by a living organism as the result of a chemical reaction during which chemical energy's converted to light energy. Chemiluminescence -'s the emission of light (luminescence) without emission of heat as the result of a chemical reaction. Phosphorescence - a specific type of photoluminescence related to fluorescence. Radioluminescence - by which luminescence's produced in a material by the bombardment of ioni… (More on Glow-in-the-dark)