polyoxymethyleneWiktionary 原文英美构词拆解polypoly-前缀oxyoxy-前缀methylenemethylene词干poly-many · polymeroxy-Sharp, keen, acute, pungent, acid词源说明From poly- + oxy- + methylene.释义名词noun1(chemistry) A polymer of formaldehyde having a repeat unit of -CH2-O- ; it is used in engineering to make small gears etc