Hȳ-po-sūl'phur-ous, a.

a. [Prefix hypo and sulphurous, q. v.; Fr. hyposulfureux.] (Chem.) Composed of sulphur and an inferior quantity of oxygen; as, hyposulphurous acid, an acid containing less oxygen than sulphurous acid. This acid is known only in combination with salifiable bases.