lucent vs radiant

lucent

adj
  • Emitting light; shining, luminous. 

  • Translucent; clear, lucid. 

radiant

adj
  • Radiating light and/or heat. 

  • Emitted as radiation. 

  • Emitting or proceeding as if from a center. 

  • Strikingly beautiful. 

  • Giving off rays; said of a bearing. 

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

  • Beaming with vivacity and happiness. 

noun
  • The apparent origin, in the night sky, of a meteor shower. 

  • A point source from which radiation is emitted. 

  • A straight line proceeding from a given point, or fixed pole, about which it is conceived to revolve. 

How often have the words lucent and radiant occurred in a corpus of books? (source: Google Ngram Viewer )