Where does “biocrust” come from?

biocrust (English) comes from English crust, from Middle English cruste, from Anglo-Norman cruste, from Latin crusta, from Proto-Italic *krustos, from Proto-Indo-European krustós, from Proto-Indo-European krews- — to form a crust, begin to freeze.

biocrust (English): biological soil crust

Definitions

  1. biological soil crust

Ancestry of “biocrust”, step by step

biocrust traces back through two separate lines of ancestry.

via English crust

StepLanguageWordMeaning
1EnglishcrustA more solid, dense or hard layer on a surface or...
2Middle Englishcrustecrust
3Anglo-Normancruste
4LatincrustaThe hard surface of a body; rind, shell, crust,...
5Proto-Italic*krustos
6Proto-Indo-Europeankrustóshardened
7Proto-Indo-Europeankrews-to form a crust, begin to freeze

via English Bio

StepLanguageWordMeaning
1EnglishBioAbbreviation of biology
2EnglishbiologyThe study of all life or living matter; The...
3Ancient Greekβίοςlife
4Ancient GreekΓένεσιςGenesis. The title of the first book of the Bible and Pentateuch as in the Septuagint translation in Greek
5Proto-Hellenicgénetisorigin, source
6Proto-Indo-Europeanǵénh₁tisbirth, production
7Proto-Indo-Europeanǵenh₁-to produce, to beget, to give birth
Every word from Proto-Indo-European krews-