Photogen
Pronunciation : Pho"to*gen
Part of Speech : n.
Etymology : [Photo- + -gen.] (Chem.)
Definition : Defn: A light hydrocarbon oil resembling kerosene. It is obtained by distilling coal, paraffin, etc., and is used as a lubricant, illuminant, etc. [Written also photogene.]
Source : Webster's Unabridged Dictionary, 1913