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
Words derived from “meridional”