Where does “green gill” come from?

green gill (English) comes from English Gill, from Middle English gille, from Old French gille, from Medieval Latin gillo, from Gaulish gallā, from Proto-Germanic gallǭ, from Proto-Indo-European ǵʰelh₃- — to flourish; green, yellow.

green gill (English): A condition found in oysters whose gills have turned a green color as a result of the consumption of Haslea ostrearia

Definitions

  1. A condition found in oysters whose gills have turned a green color as a result of the consumption of Haslea ostrearia

Ancestry of “green gill”, step by step

green gill traces back through two separate lines of ancestry.

via English Gill

StepLanguageWordMeaning
1EnglishGillSomeone connected with Gillingham Football Club,...
2Middle Englishgille
3Old Frenchgillea wine measure; wine measure
4Medieval Latingilloearthenware jar; A cooler for liquids
5Gaulishgallāvessel
6Proto-Germanicgallǭgall, bile
7Proto-Indo-Europeanǵʰelh₃-to flourish; green, yellow

via English Green

StepLanguageWordMeaning
1EnglishGreenOf, or pertaining, to a Green Party or green...
2Middle Englishgrenegreen
3Old Englishgrēnegreen
4Proto-West Germanicgrōnīgreen
5Proto-Germanicgrōnizgreen
6Proto-Indo-Europeanǵʰreh₁-to become green, grow; to grow; to green, to grow
Every word from Proto-Indo-European ǵʰelh₃-Every word from Proto-Germanic gallǭEvery word from Gaulish gallā