Where does “polycristallin” come from?

polycristallin (French) comes from French cristallin, from Latin crystallinus, from Ancient Greek κρυστάλλινος, from Ancient Greek κρύσταλλος, from Ancient Greek κρύος, from Proto-Indo-European krews- — to form a crust, begin to freeze.

polycristallin (French): polycrystalline

Definitions

polycrystalline

Ancestry of “polycristallin”, step by step

Step	Language	Word	Meaning
1	French	cristallin	crystalline; lens
2	Latin	crystallinus	crystal; resembling crystal; crystalline
3	Ancient Greek	κρυστάλλινος	icy; of crystal
4	Ancient Greek	κρύσταλλος	ice; rock crystal
5	Ancient Greek	κρύος	cold, chilliness; frost; ice
6	Proto-Indo-European	krews-	to form a crust, begin to freeze

Every word from Proto-Indo-European krews- →Every word from Ancient Greek κρύος →Every word from Ancient Greek κρύσταλλος →