Where does “blueschist” come from?

blueschist (English) comes from English Blue, from Middle English blēwe, from Anglo-Norman blew, from Middle French bleu, from Old French blöe, from Latvian blāvus, from Old High German blāo, from Proto-West Germanic blāu — yellow, blond, grey.

blueschist (English): A metamorphic rock containing glaucophane

Definitions

  1. A metamorphic rock containing glaucophane

Ancestry of “blueschist”, step by step

blueschist traces back through two separate lines of ancestry.

via English Blue

StepLanguageWordMeaning
1EnglishBlueA letterman at Oxford or Cambridge; A member of...
2Middle Englishblēwe
3Anglo-Normanblewblue
4Middle Frenchbleublue
5Old Frenchblöeblue
6Latvianblāvusaccusative plural masculine form of blāvs
7Old High Germanblāoblue, dark, grey; blue; yellow
8Proto-West Germanicblāublue
9Proto-Germanicblēwazblue; a dark bluish or grey colour, black
10Proto-Indo-Europeanbʰlēw-yellow, blond, grey

via English schist

StepLanguageWordMeaning
1EnglishschistAny of a variety of coarse-grained crystalline...
2Frenchschisteshale, schist
3Latinschistos
4Ancient Greekσχιστόςcloven, divided; that may be split or cleft;...
5Ancient GreekσχίζωI split, cleave; I divide
6Proto-Indo-Europeansḱeyd-to shade; to cut off; to part with, separate, cut...
7Proto-Indo-Europeansḱēy-to shine; to shimmer; shadow; luster, gloss,...
8Proto-Germanicskaidąseparation, distinction
9Proto-Indo-EuropeanskÁit-to cut, part, spearate, divide; to cut, part,...
Every word from Proto-Indo-European bʰlēw-Every word from Proto-Germanic blēwazEvery word from Proto-West Germanic blāu