n. [ Pref. bi- + sulphide. ] (Chem.) A sulphide having two atoms of sulphur in the molecule; a disulphide, as in iron pyrites, FeS2; -- less frequently called bisulphuret. [ 1913 Webster ]

n. [ Pref. di- + sulphide. ] (Chem.) A binary compound of sulphur containing two atoms of sulphur in each molecule; -- formerly called disulphuret. Cf. Bisulphide. [ 1913 Webster ]

n. (Chem.) One of a series of compounds, derived from hydrogen sulphide by the replacement of half its hydrogen by a base or basic radical; as, potassium hydrosulphide, KSH. The hydrosulphides are analogous to the hydrates and include the mercaptans. [ 1913 Webster ]

n. [ Mono- + sulphide. ] (Chem.) A sulphide containing one atom of sulphur, and analogous to a monoxide; -- contrasted with a polysulphide; as, galena is a monosulphide. [ 1913 Webster ]

n. (Chem.) A ternary compound of oxygen and sulphur. [ 1913 Webster ]

n. (Chem.) A sulphide containing more sulphur than some other compound of the same elements; as, iron pyrites is a persulphide; -- formerly called persulphuret. [ 1913 Webster ]

n. [ Poly- + sulphide. ] (Chem.) A sulphide having more than one atom of sulphur in the molecule; -- contrasted with monosulphide. [ 1913 Webster ]

n. [ Proto- + sulphide. ] (Chem.) That one of a series of sulphides of any element which has the lowest proportion of sulphur; a sulphide with but one atom of sulphur in the molecule. [ 1913 Webster ]

n. [ Sesqui- + sulphide. ] (Chem.) A sulphide, analogous to a sesquioxide, containing three atoms of sulphur to two of the other ingredient; -- formerly called also sesquisulphuret; as, orpiment, As2S3 is arsenic sesquisulphide. [ 1913 Webster ]

n. (Chem.) A nonacid compound consisting of one equivalent of sulphur and more than one equivalent of some other body, as a metal. [ 1913 Webster ]

n. (Chem.) A binary compound of sulphur, or one so regarded; -- formerly called sulphuret. [ 1913 Webster ]

Double sulphide (Chem.), a compound of two sulphides. --
Hydrogen sulphide. (Chem.) See under Hydrogen. --
Metallic sulphide, a binary compound of sulphur with a metal. [ 1913 Webster ]

n. [ Pref. ter- + sulphide. ] (Chem.) A trisulphide. [ 1913 Webster ]

n. [ Pref. tri- + sulphide. ] (Chem.) A sulphide containing three atoms of sulphur. [ 1913 Webster ]