Where does “blauwalg” come from?

blauwalg (Dutch) comes from Dutch blauw, from Middle Dutch blau, from Old Dutch blāo, from Proto-West Germanic blāu, from Proto-Germanic blēwaz, from Proto-Indo-European bʰlēw- — yellow, blond, grey.

blauwalg (Dutch): blue-green alga, member of the "Cyanobacteria"

Definitions

blue-green alga, member of the "Cyanobacteria"

Ancestry of “blauwalg”, step by step

blauwalg traces back through two separate lines of ancestry.

via Dutch blauw

Step	Language	Word	Meaning
1	Dutch	blauw	blue; visibly bruised, as in blauwe plek 'a...
2	Middle Dutch	blau	blue; the colour blue
3	Old Dutch	blāo	blue
4	Proto-West Germanic	blāu	blue
5	Proto-Germanic	blēwaz	blue; a dark bluish or grey colour, black
6	Proto-Indo-European	bʰlēw-	yellow, blond, grey

via Dutch alg

Step	Language	Word	Meaning
1	Dutch	alg	alga
2	German	alge	alga
3	Latin	alga	Seaweed; plants that grow in freshwater;...
4	Proto-Indo-European	alǵ-	to be dirty, be slimy; frog; duckweed; to be...

Every word from Proto-Indo-European bʰlēw- →