• Webster's Revised Unabridged Dictionary
    • n Eikonogen (Photog. & Chem) The sodium salt of a sulphonic acid of a naphthol, C10H5(OH)(NH2)SO3Na used as a developer.
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Century Dictionary and Cyclopedia
    • n eikonogen The trade-name of the sodium salt of amido-β- naphthol-monosulphonic acid, used in photography as a developer.
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Webster's Revised Unabridged Dictionary
Gr. e'ikw`n e'iko`nos, image + root of gi`gnesqai to be born


In literature:

Eikonogen developer patented by Dr. Andresen, of Berlin, Germany, March 26th.
"The Evolution of Photography" by John Werge