Transmitting light, heat, or other radiation. Stars, for example, are radiant bodies.
The definition of luminous is giving off a very bright light or a person or trait considered glowing.
Comparatively high on the scale of brightness:
Find another word for phosphorescent. In this page you can discover 4 synonyms, antonyms, idiomatic expressions, and related words for phosphorescent, like: radiant, glowing, luminous and bright.