oxaphosphineWiktionary 原文英美构词拆解oxaoxa-前缀phosphinephosphine词干oxa-(organic chemistry) Used to name compounds in which a carbon atom (typically a methylene group) has been replaced by one of oxygen词源说明From oxa- + phosphine.释义名词noun1(organic chemistry) The six-membered unsaturated heterocycle containing four carbon atoms, one oxygen atom, one phosphorus atom and two double bonds