15 letters · 21 points in Scrabble
adjective (of long-chain carbon compounds especially fats) having many unsaturated bonds
originEtymology tree Proto-Indo-European *pleh₁- Proto-Indo-European *polh₁ús Ancient Greek πολῠ́ς (polŭ́s)lbor. English poly- English un- English saturated English unsaturated English polyunsaturated From poly- + unsaturated.
Etymology from Wiktionary, CC BY-SA 3.0