A combining form or prefix used in chemistry to indicate the presence of arsenic or arsenic-containing groups in organic compounds.
From Latin 'arsenicum' (arsenic), used as a combining form in chemical nomenclature to prefix compound names, similar to how 'hydro-' or 'chloro-' prefix the names of other element-containing compounds.
Chemistry is like Lego building with atoms, and 'arseno-' is a prefix that means 'this molecule has an arsenic atom stuck onto it somewhere'—it lets chemists communicate the structure instantly without drawing out the whole thing!
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