An archaic or obsolete term referring to arsenic metal or arsenic compounds, sometimes used in older chemical and medical texts.
From Latin 'arsenicum' (arsenic) + '-ium' (metallic element suffix, as in calcium, sodium), representing an older nomenclature system before modern chemical naming conventions were standardized.
Arsenium is basically 'old chemistry talk'—it's like how people used to call elements by Latin-ified names before IUPAC came along and said everyone needed to use the same system; it's still occasionally used in historical texts!
Complete word intelligence in one call. Free tier — 50 lookups/day.