■ adjective
1》 shining or glowing brightly.
↘displaying great joy, love, or health.
↘(of an emotion or quality) very conspicuous.
2》 transmitted by electromagnetic radiation, rather than conduction or convection.
↘(of an appliance) emitting ~ energy for cooking or heating.
■ noun
1》 a point or object from which light or heat radiates.
2》 Astronomy the apparent focal point of a meteor shower.
Derivatives
radiance noun
radiancy noun
~ly adverb
Origin
ME: from L. ~- , radiare (see radiate ).