GNU Collaborative International Dictionary of English

last match results

Found one definition

1.       
   Optography , n. [Optic + -graphy.] (Physiol.) The production of an optogram on the retina by the photochemical action of light on the visual purple; the fixation of an image in the eye. The object so photographed shows white on a purple or red background. See Visual purple, under Visual.
   1913 Webster