comb. form of next, as in arsenio-sulphide, -sulphuret, Chem., a compound of arsenious sulphide with a metallic sulphide; an arseno-sulphide. Arsenio-siderite, Min. [σίδηρος iron], a fibrous mineral of yellowish-brown and somewhat golden color, containing arsenic acid, sesquioxide of iron, and lime (Dana).
