Where does “monopolar” come from?

I need to work through this etymology chain carefully. Looking at the chain provided: - English polar - Ancient Greek μόνος (monos, meaning "alone/single") - Ancient Greek χρῶμα (chroma, meaning "color") - Latin -alis (suffix) - Proto-Indo-European kʷel- (appears twice) Wait, this chain seems problematic. The chain shows "monos" and "chroma" as separate Ancient Greek elements, but they're not in a clear linear progression. And the Latin "-alis" suffix doesn't fit naturally between these Greek words. Let me reconsider what the chain actually represents. The chain appears malformed or I'm misreading it. However, I should work with what's given. For "monopolar" - this would logically be "mono-" (one) + "polar" (relating to poles). The

monopolar (English): Having a single pole; Using a single electrode