'Sesquisulphide' definitions:

Definition of 'Sesquisulphide'

From: GCIDE

Sesquisulphide \Ses`qui*sul"phide\, 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]