Definition: The term "effulge" is a term used in astronomy to describe the appearance of a star as it radiates light through a cloud or atmosphere. When a star emits radiation, it can emit ultraviolet and X-rays that are visible to the human eye. The emission of these particles is called "efflux". Therefore, if you see a star emitting ultraviolet or X-ray emissions, it's likely that it's effulgent.
effulge