Where does “helic-” come from?

helic- (English) comes from Latin helīx, from Ancient Greek ἕλιξ, from Ancient Greek πτερόν, from Proto-Indo-European péth₂r̥, from Proto-Indo-European peth₂- — to spread out; to fly.

Ancestry of “helic-”, step by step

Step	Language	Word	Meaning
1	Latin	helīx	a kind of ivy
2	Ancient Greek	ἕλιξ	Anything twisted, winding, or spiral; The tendril...
3	Ancient Greek	πτερόν	feather; wing; Any winged creature
4	Proto-Indo-European	péth₂r̥	wing; feather
5	Proto-Indo-European	peth₂-	to spread out; to fly

Words derived from “helic-”

helicidine
helicitic

Every word from Proto-Indo-European peth₂- →Every word from Proto-Indo-European péth₂r̥ →Every word from Ancient Greek πτερόν →