[rey-dee-uh
ns] 
| 1. | radiant brightness or light: the radiance of the tropical sun. |
| 2. | warm, cheerful brightness: the radiance of her expression. |
| 3. | Rare. radiation. |
| ra·di·ance (rā'dē-əns) n.
|
radiance ra·di·ance (rā'dē-əns) or ra·di·an·cy (-ən-sē)
n.
The quality or state of being radiant.
The radiant energy emitted per unit time in a specified direction by a unit area of an emitting surface.