Where does “cianobacteri” come from?

cianobacteri (Catalan) comes from Catalan ciano-, from Ancient Greek κυάνεος, from Ancient Greek κῠ́ᾰνος, from Hittite kuwannan-, from Proto-Indo-European ḱwey- — to hiss, to whistle, to whisper; to shine, white,...

cianobacteri (Catalan): cyanobacterium

Definitions

cyanobacterium

Ancestry of “cianobacteri”, step by step

Step	Language	Word	Meaning
1	Catalan	ciano-	cyano
2	Ancient Greek	κυάνεος	of the color of κῠ́ᾰνος: dark; dark-blue
3	Ancient Greek	κῠ́ᾰνος	dark-blue enamel
4	Hittite	kuwannan-	precious stone, copper, blue
5	Proto-Indo-European	ḱwey-	to hiss, to whistle, to whisper; to shine, white,...

Every word from Proto-Indo-European ḱwey- →Every word from Hittite kuwannan- →Every word from Ancient Greek κῠ́ᾰνος →