Where does “photochromatic” come from?

photochromatic (English) comes from English photo, from English photography, from French photographie, from Ancient Greek φωτο-, from Ancient Greek φῶς, from Proto-Hellenic pʰáos, from Proto-Indo-European bʰéh₂os, from Proto-Indo-European bʰeh₂-.

photochromatic (English): Pertaining to or exhibiting photochromism;...

Definitions

  1. Pertaining to or exhibiting photochromism;...

Ancestry of “photochromatic”, step by step

photochromatic traces back through two separate lines of ancestry.

via English photo

StepLanguageWordMeaning
1EnglishphotoA photograph; A photo finish; To take a...
2EnglishphotographyThe art and technology of producing images on...
3Frenchphotographiephotography; photograph
4Ancient Greekφωτο-
5Ancient GreekφῶςAttic form of φᾰ́ος
6Proto-Hellenicpʰáos
7Proto-Indo-Europeanbʰéh₂os
8Proto-Indo-Europeanbʰeh₂-to shine, glow light; to speak, say
9Proto-Indo-Europeanbʰeh₂-s-ri-

via English chromatic

StepLanguageWordMeaning
1EnglishchromaticRelating to or characterised by hue; Having the...
2EnglishchromatinA complex of DNA, RNA and proteins within the...
3GermanChromatinchromatin
4German-īncreates the female form for many nouns for living beings; umlaut usually occurs in monosyllables, but rarely in polysyllables
5Latin-īnusof or pertaining to; -ine
6Proto-Italic-īnosof/belonging to
7Proto-Indo-European-iHnosCreates adjectives of materials
8Proto-Indo-European-no-adjectival suffix
Every word from Proto-Indo-European bʰeh₂-s-ri-Every word from Proto-Indo-European bʰeh₂-Every word from Ancient Greek φωτο-
photochromatic — Etymology, Origin & Word History | Etymology Explorer