luminosity

  1. Noun.  (uncountable) the state of being luminous, or a luminous object; brilliance or radiance.
  2. Noun.  (physics) the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor.
  3. Noun.  (astronomy) the rate at which a star radiates energy in all directions.

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This entry was last updated on RefTopia from its source on 3/20/2012.