(inorganic chemistry) The simple systematic name for water, H₂O.

(inorganic chemistry) silicon dioxide (SiO₂), silica. / (inorganic chemistry) silicon monoxide (SiO).

(chemistry) Any binary compound of sulfur and oxygen; either sulfur monoxide, sulfur dioxide or sulfur trioxide.

(organic chemistry) A strong-smelling liquid, ((CH₃)₂As)₂O

(inorganic chemistry) A white powder (MgO) with a high melting point; it occurs naturally as periclase, an ore of magnesium.

(chemistry) An amorphous solid, ZnO, white when pure but often pale yellow, used in pigments and cosmetics

(inorganic chemistry) A white powderous substance, CaO, normally made by heating calcium carbonate.

(chemistry) The part of a flame that has an excess of oxygen and is capable of oxidizing something that it is in contact with

plural of oxidation state

plural of oxidation number