Sŭl'phur, n.

n. [Lat., whence It. solfo, zolfo, Sp. azufre, Pg. enxofre, Pr. solfre, solpre, Fr. soufre, D. sulfer, solfer.] A simple mineral substance, of a yellow color, brittle, insoluble in water, easily fusible and inflammable;—called also brimstone, that is, burn-stone, from its great combustibility. It burns with a blue flame and a peculiar suffocating odor.

Sulphur acid, an acid compound of sulphur with an element or equivalent body, capable of combining with a sulphur base to form a sulphur salt or sulpho-salt. — Sulphur base, a sulphide which forms a sulpho-salt by combination with a sulphur acid; an electro-positive sulphide. Miller. — Sulphur salt (Chem.), a sulpho-salt. See SALT.