radian
— Noun
– English
~ the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees)
radiance
— Noun
– English
~ the quality of being bright and sending out rays of light
radiance
— Noun
– English
~ an attractive combination of good health and happiness; "the radiance of her countenance"
radiance
— Noun
– English
~ the amount of electromagnetic radiation leaving or arriving at a point on a surface
radiancy
— Noun
– English
~ the quality of being bright and sending out rays of light
radiant flux
— Noun
– English
~ the rate of flow of radiant energy (electromagnetic waves)
radiant heating
— Noun
– English
~ heating a building by radiation from panels containing hot water or electrical heaters
radiant energy
— Noun
– English
~ energy that is transmitted in the form of (electromagnetic) radiation; energy that exists in the absence of matter
radiant
— Adjective
– English
~ radiating or as if radiating light; "the beaming sun"; "the effulgent daffodils"; "a radiant sunrise"; "a refulgent sunset"