Where does “Chlorophyceae” come from?

Chlorophyceae (Translingual) comes from Latin chlōrus, from Ancient Greek χλωρός, from Proto-Indo-European ghlo-.

Ancestry of “Chlorophyceae”, step by step

Step	Language	Word	Meaning
1	Latin	chlōrus	—
2	Ancient Greek	χλωρός	greenish-yellow, pale green; pale, pallid; fresh,...
3	Proto-Indo-European	ghlo-	—