tetrads四色相(等间隔)配色tetran.脂鲤（南美产的热带鱼）pref.四；四原；四基tetrahydropapaverine四氢罂粟碱tetrachoric function四项函数Tetraplektron acutunn.尖头四棘藻tetracarbonyl nickle四羟基镍tetracemate disodium依地酸二钠tetrahydroxyflavanol四羟基黄酮醇tetramethylene amine四亚甲基胺tetramethylglucoside四甲基葡糖甙tetrahedron elements四面体单元tetradecyl mercaptan十四烷基硫醇