epoxideWiktionary 原文/ˈipɑksaɪd/构词拆解epep-前缀oxideoxy词干ep-Alternative form of epi- (“on top of, above”).词源说明From ep- + oxy.释义名词noun1(organic chemistry) Any of a class of organic compound, cyclic ethers, having a three-membered ring; they are prepared by the selective oxidation of alkenes or by ring-closure of halohydrins; used to make plastics.