Webster's Revised Unabridged Dictionary · 1913

Eikonogen

Eikonogen , noun

[Greek e'ikw`n, e'iko`nos, image + root of gi`gnesqai to be born.]

(Photography & Chemistry) The sodium salt of a sulphonic acid of a naphthol, C10H5(OH)(NH2)SO3Na used as a developer.