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

(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.

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

(organic chemistry) diethyl ether.

(chemistry) A thermoplastic polyether resin whose repeat unit is derived from hydroquinone

plural of arsine oxide

plural of arene oxide

(inorganic chemistry) Any oxide of ytterbium, but especially the colourless solid Yb₂O₃ (ytterbia)

(inorganic chemistry) Any oxide of lutetium, but especially the white solid Lu₂O₃ (lutecia)