photogen: Meaning and Definition of

pho•to•gen

Pronunciation: (fō'tu-jun, -jen"), [key]
— n.
  1. a light oil obtained by the distillation of bituminous shale, coal, or peat: once commercially produced chiefly as an illuminant and as a solvent.
  2. a photogenic organ, organism, or substance.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
photogelatin process photogene
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