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radiant
WIKTIONARY
radiant
Adjective
  • Radiating light and/or heat.
  • Emitted as radiation.
  • Beaming with vivacity and happiness.
  • Emitting or proceeding as if from a center.
  • Giving off rays; said of a bearing. heraldry
  • Having a ray-like appearance, like the large marginal flowers of certain umbelliferous plants; said also of the cluster which has such marginal flowers. botany
Noun
  • A point source from which radiation is emitted.
  • The apparent origin, in the night sky, of a meteor shower. astronomy
  • A straight line proceeding from a given point, or fixed pole, about which it is conceived to revolve.