Where does “meridional” come from?

meridional (Middle French) comes from Latin merīdiōnālis, from Latin merīdiēs, from Latin medīdiēs, 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.

Ancestry of “meridional”, step by step

StepLanguageWordMeaning
1Latinmerīdiōnālissouthern
2Latinmerīdiēsmidday, noon
3Latinmedīdiēs
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

Words derived from “meridional

Every word from Proto-Indo-European dyew-Every word from Proto-Indo-European dyéwsEvery word from Proto-Indo-European dyḗws