Where does “meridian” come from?

Meridian comes from Middle English meridian, from Anglo-Norman meridien, from Latin meridianus, an adjective derived from meridies meaning "midday," ultimately from Proto-Indo-European médʰyos meaning "middle."

meridian (English): The south; Midday, noon; A great circle passing...

Definitions

  1. The south; Midday, noon; A great circle passing...

Ancestry of “meridian”, step by step

meridian traces back through 3 separate lines of ancestry.

via Middle English meridian

StepLanguageWordMeaning
1Middle Englishmeridian
2Middle Frenchmeridienmidday; the south; celestial meridian
3Latinmeridianusmidday, noon; southern
4Latinmerīdiēsmidday, noon
5Latinmedīdiēs
6LatindiēsA day, particularly
7Proto-Italicdjēmaccusative singular of *djous
8Proto-Italic*djous
9Proto-Indo-Europeandyḗwssky, heaven; sky god
10Proto-Indo-Europeandyéwssky, heaven
11Proto-Indo-Europeandyew-to be bright; sky, heaven

via French méridien

StepLanguageWordMeaning
1Frenchméridienmeridian all senses

via German Meridian

StepLanguageWordMeaning
1GermanMeridianmeridian

Words derived from “meridian

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