noun (n)

• a ray of sunlight(noun.phenomenon)

  Synonym:
  sunbeam
  

  source: wordnet30
• herb having a basal cluster of grey-green leaves and leafless stalks each with a solitary broad yellow flower head; desert areas Idaho to Arizona(noun.plant)

  Synonym:
  enceliopsis nudicaulis
  

  source: wordnet30
• a ray of artificial ultraviolet light from a sunray lamp(noun.phenomenon)

  Synonym:
  sun-ray
  

  source: wordnet30