What is "photochromy"

Photochromy \Pho*toch"ro*my\, n. [Photo- + Gr. ? color.] The art or process of reproducing colors by photography.

n. The art or process of reproducing colours by photography.

Photochromy is the art or process of reproducing colors by photography. Not to be confused with Photochromism (a reversible color change induced by light energy). See Photochromism. Furthermore, a Photochrom is not the result of the photochromy process.