Where does “photocascade” come from?

photocascade (English) comes from English cascade, from French cascade, from Italian cascata, from Italian cascare, from Vulgar Latin casicare, from Latin cadēre, from Latin cadō, from Proto-Italic kadō — to fall.

photocascade (English): A photochemical cascade (series of reactions)

Definitions

  1. A photochemical cascade (series of reactions)

Ancestry of “photocascade”, step by step

photocascade traces back through two separate lines of ancestry.

via English cascade

StepLanguageWordMeaning
1EnglishcascadeA waterfall or series of small waterfalls; A...
2Frenchcascadecascade; a stunt performed for cinematic...
3Italiancascatacascade, waterfall; fall; cascade
4Italiancascareto fall
5Vulgar Latincasicarepresent active infinitive of *casicō
6Latincadēre
7Latincadōto fall, to fall out
8Proto-Italickadōfall, sink
9Proto-Indo-Europeanḱad-to fall

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-
Every word from Proto-Indo-European ḱad-