Emission of light from a living organism.
Production of light without the production of heat; light not due to incandescence or thermal sources; occurs at low temperatures.
The emission of light by a material following excitation by some stimulus.
Production of light without production of heat.
The phenomenon of radiation or light emission from a substance emerges as a consequence of the prior interaction with a certain form of energy. For instance, we observe the captivating glow of light emanating from phosphorus subsequent to its exposure to sunlight.