| blackbody |
in physics, a hypothetical body that theoretically absorbs all radiant energy falling on its surface. |
| bright |
in a radiant or shining manner; brightly. [1/7 definitions] |
| effulgent |
shining brightly; radiant; brilliant. |
| first quarter |
the phase of the moon's reflection of sunlight that occurs when the right half of the moon, as seen from the Northern Hemisphere, is radiant, about one week after the new moon. |
| fulgent |
remarkably bright and shining; dazzling; radiant. |
| glow |
to be or appear to be filled with strong positive feeling; be radiant. [1/6 definitions] |
| greenhouse gas |
any atmospheric gas that absorbs and emits radiant energy and contributes to the greenhouse effect. |
| light up |
to become radiant, as with joy or interest. [1/5 definitions] |
| nimbus |
a radiant light, often shown in paintings as a circle or halo about the head of a saint, deity, or the like. [1/3 definitions] |
| Phoibos |
a byname, meaning "radiant," for the Greek god Apollo. The Latin variant is Phoebus. |
| photovoltaic |
pertaining to, producing, or utilizing voltage that has been generated using radiant energy. |
| Planck's constant |
the fundamental constant in quantum mechanics that expresses the ratio of the radiant energy of one quantum to the frequency of radiation. |
| radial |
related to or transmitted as rays; radiant. [1/7 definitions] |
| radiance |
the quality of being radiant or bright. [1/2 definitions] |
| radiant flux |
the rate at which radiant energy such as heat or light flows through a given area. |
| radiate |
to project in a radiant manner. [1/8 definitions] |
| radio- |
radiant energy; x-rays. [1/3 definitions] |
| radiolucent |
showing little or no resistance to x-rays or other forms of radiant energy. |
| radiometer |
an instrument for measuring radiant energy or transforming radiant energy into mechanical energy, consisting of vertical vanes that absorb more heat on one side than the other, so that they rotate around an axis when irradiated. |
| radiosensitive |
sensitive or susceptible to destruction by radiant energy, as living organisms or tissue. |
| refulgent |
shining brilliantly; radiant. |