Resembling soap. / Resembling a soap opera. / Full of soap. / Covered in soap. / (dated) Committing or involving flattery.

(mineralogy) A water-soluble mineral NaAl(SO₄)₂·12(H₂O); a form of alum in which potassium is replaced by sodium.

A sodium vapor lamp.

Alternative spelling of sodium vapor lamp

(of a nuclear reactor) that uses liquid sodium as a coolant

A street lamp in which electricity is passed through sodium vapour to emit a yellow light.

any soap made by the reaction of fat with sodium hydroxide

(chemistry) An alloy of sodium and mercury; used as a powerful reducing agent, and in certain types of sodium lamp.

(biochemistry) The transport of sodium ions across biological membranes using the metabolic energy of ATP.

(inorganic chemistry) A strong, caustic alkali (NaOH) used in the manufacture of soap, detergents, paper, textiles and having many other industrial applications.