Of or pertaining to photogeny.In biology, producing light without sensible heat, as an animal or vegetable organism; giving rise to luminosity or phosphorescence; photogenous.A reproduction of the configuration of any flat translucent object, as a leaf, or the wing of an insect, or a drawing upon translucent paper or tracing-cloth, made by confining it under glass in contact with a sensitive film, exposing to the action of light, and fixing or developing the image resulting in the film. A variety of photogenic processes arc now in use for copying mechanical drawings. See blue-printing.n. In general, light-producing; luminous.