Where does “equidiurnal” come from?

equidiurnal (English) comes from English diurnal, from Latin diurnālis, from Latin diurnus, from Latin diēs, from Proto-Italic djēm, from Proto-Italic *djous, from Proto-Indo-European dyḗws, from Proto-Indo-European dyéws — to be bright; sky, heaven.

equidiurnal (English): Pertaining to the time of equal day and night;...

Definitions

  1. Pertaining to the time of equal day and night;...

Ancestry of “equidiurnal”, step by step

equidiurnal traces back through two separate lines of ancestry.

via English diurnal

StepLanguageWordMeaning
1EnglishdiurnalHappening or occurring during daylight, or...
2Latindiurnālisdiurnal of the day; that takes place during the day
3Latindiurnusof the day; daily; day
4LatindiēsA day, particularly
5Proto-Italicdjēmaccusative singular of *djous
6Proto-Italic*djous
7Proto-Indo-Europeandyḗwssky, heaven; sky god
8Proto-Indo-Europeandyéwssky, heaven
9Proto-Indo-Europeandyew-to be bright; sky, heaven

via English equi

StepLanguageWordMeaning
1Englishequi
Every word from Proto-Indo-European dyew-Every word from Proto-Indo-European dyéwsEvery word from Proto-Indo-European dyḗws