Where does “photosomnolence” come from?

photosomnolence (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-.

photosomnolence (English): somnolence (induction of sleep) in a nocturnal animal caused by exposure to light

Definitions

  1. somnolence (induction of sleep) in a nocturnal animal caused by exposure to light

Ancestry of “photosomnolence”, step by step

photosomnolence 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 somnolence

StepLanguageWordMeaning
1EnglishsomnolenceA state of drowsiness or sleepiness
2Middle Frenchsomnolence
3Late Latinsomnolentiasleepiness, drowsiness; vocative singular of...
4Latinsomnussleep; drowsiness, slumber sloth, idleness; death
5Proto-Italicswepnos
6Proto-Indo-Europeanswépnossleep, slumber
7Proto-Indo-Europeanswopnosdream
8Proto-Indo-Europeanswep-to sleep
Every word from Proto-Indo-European bʰeh₂-s-ri-Every word from Proto-Indo-European bʰeh₂-Every word from Ancient Greek φωτο-