(chemistry) Any oxide containing two oxygen atoms in each molecule.

plural of dioxide

Archaic form of dioxide.

plural of dioxid

(inorganic chemistry) The yellow-brown solid, PuO₂, formed by the spontaneous oxidation of plutonium metal; it is used in mixed oxide fuel for nuclear reactors

(chemistry) hydrogen peroxide

(American spelling, inorganic chemistry) A toxic gas, of molecular formula SO₂ that is found in the emissions of volcanos and those of burning coal or petroleum; dissolves in water to form sulfurous acid and, in the presence of oxygen, sulfuric acid, and is thus responsible for acid rain.

(inorganic chemistry, chiefly British spelling) Alternative spelling of sulfur dioxide

a reddish-yellow explosive gas, ClO₂, used as a water disinfectant and to bleach flour and wood pulp

(inorganic chemistry) The binary compound NO₂, a brownish gas that is a poisonous air pollutant; it exists in equilibrium with dinitrogen tetroxide.