D defs.my
Entry 1 sense Webster, 1913

Photogen

· Pho·to·gen · IPA
01 n. A light hydrocarbon oil resembling kerosene. It is obtained by distilling coal, paraffin, etc., and is used as a lubricant, illuminant, etc.
  1. 1.
    A light hydrocarbon oil resembling kerosene. It is obtained by distilling coal, paraffin, etc., and is used as a lubricant, illuminant, etc.(Chem.)