Where does “photism” come from?

photism (English) comes from English phot, from English photograph, from English photo-, from Ancient Greek φωτο-, from Ancient Greek φῶς, from Proto-Hellenic pʰáos, from Proto-Indo-European bʰéh₂os, from Proto-Indo-European bʰeh₂-.

photism (English): A luminous appearance, image or subjective...

Definitions

  1. A luminous appearance, image or subjective...

Ancestry of “photism”, step by step

photism traces back through two separate lines of ancestry.

via English phot

StepLanguageWordMeaning
1EnglishphotA photometric unit of illuminance, or luminous...
2EnglishphotographA picture created by projecting an image onto a...
3Englishphoto-light, electromagnetic radiation; photography
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 ism

StepLanguageWordMeaning
1EnglishismAn ideology, system of thought, or practice that...
2English-ismUsed to form nouns of action or process or result...
3Latin-ismus-ism
4Ancient Greek-ισμόςForms abstract nouns
5Ancient Greek-μόςForms abstract nouns
6Proto-Indo-European-mósCreates action/result nouns from verb stems
Every word from Proto-Indo-European bʰeh₂-s-ri-Every word from Proto-Indo-European bʰeh₂-Every word from Ancient Greek φωτο-