Definition of photochromy in US English:

photochromy

noun

  • 1The process of producing printed images in colour by photographic means; colour photography. Compare photochrome. Now rare.

  • 2Science. = "photochromism".

Origin

Late 19th century; earliest use found in Art Journal. From photo- + -chromy.

Pronunciation

photochromy

/ˈfəʊtəˌkrəʊmi/