Definition of photochromatic in English:

photochromatic

adjective

  • Of or relating to the action of light in causing a change of colour or a perception of colour; specifically (of lenses) exhibiting photochromism, photochromic.

Origin

Mid 19th century; earliest use found in Proceedings of the Royal Society of London. From photo- + chromatic, perhaps after French photochromatique.

Pronunciation

photochromatic

/ˌfəʊtə(ʊ)krəˈmatɪk/