lu·mi·nary /ˈluməˌnɛri/
  發光體,權威者,著名的知識分子
  Lu·mi·na·ry n.; pl. Luminaries
  1. Any body that gives light, especially one of the heavenly bodies. “ Radiant luminary.”
  Where the great luminary . . .
  Dispenses light from far.   --Milton.
  2. One who illustrates any subject, or enlightens mankind; as, Newton was a distinguished luminary.
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  luminary
       n : a celebrity who is an inspiration to others; "he was host to
           a large gathering of luminaries" [syn: leading light, guiding
           light, notable, notability]