for·mal·de·hydeBrE/fɔːˈmældɪhaɪd/NAmE/fɔːrˈmældɪhaɪd/noun[U] (symbolCH2O) agaswithastrongsmell甲醛 (also specialistfor·mal·inBrE/ˈfɔːməlɪn/NAmE/ˈfɔːrməlɪn/) aliquidmadebymixingformaldehydeandwater, usedforpreservingbiological, making plastics and as a disinfectantspecimens, makingplasticsandasadisinfectant福尔马林;甲醛水溶液