dihydropyranWiktionary 原文英美构词拆解didi-前缀hydrohydro-前缀pyranpyran词干di-Two. · Double, twice the quantity.hydro-water · liquid词源说明From di- + hydro- + pyran.释义名词noun1(organic chemistry) The compound with chemical formula C5H8O, a cyclic ether used to protect alcohols in organic synthesis.