6 letters · 14 points in Scrabble
noun any of several toxic or carcinogenic hydrocarbons that occur as impurities in herbicides
originPIE word *dwóh₁ From di- (prefix meaning ‘double; two’) + ox(ygen) + -in (suffix indicating a neutral chemical compound), a reference to the fact that the compound has two oxygen atoms.
Etymology from Wiktionary, CC BY-SA 3.0