containing the . a combining form representing arsenic, or arseno group, in the formation of compound words: arsenopyrite.
- Arseno group
the bivalent group −As=As−.
a mineral, arsenic trioxide, As 2 O 3 , occurring usually as a white incrustation on arsenical ores.
a common mineral, iron arsenic sulfide, FeAsS, occurring in silver-white to steel-gray crystals or masses: an ore of arsenic. noun a white or grey metallic mineral consisting of a sulphide of iron and arsenic that forms monoclinic crystals with an orthorhombic shape: an ore of arsenic. Formula: FeAsS Also called mispickel