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adj. Emitting or proceeding as from a center; resembling rays; radiating; radiate. Especially, emitting or darting rays of light or heat; issuing in beams or rays; beaming with brightness; emitting a vivid light or splendor; as, the radiant sun. Beaming with vivacity and happiness; as, a radiant face.


 - (Her.) Giving off rays; - said of a bearing; as, the sun radiant; a crown radiant.


 - (Bot.) Having a ray like appearance, as the large marginal flowers of certain umbelliferous plants; - said also of the cluster which has such marginal flowers.


 - Radiant energy (Physics), energy ...