Dioxide
Pronunciation : Di*ox"ide (; 104)
Part of Speech : n.
Etymology : [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.
Source : Webster's Unabridged Dictionary, 1913