二氧化物
Dioxide \Di*ox"ide\ (?; 104), n. [Pref. di- + oxide.] (Chem.) (a) An oxide containing two atoms of oxygen in each molecule; binoxide. (b) An oxide containing but one atom or equivalent of oxygen to two of a metal; a suboxide. [Obs.] {Carbon dioxide}. See {Carbonic acid}, under {Carbonic}.
dioxide n : an oxide containing two atoms of oxygen in the molecule