Relating to complex compounds made of different polymetallic oxyanions, often used in chemistry and catalysis.
From Greek 'hetero-' (different) + 'poly-' (many) + '-ic' (relating to). This technical term developed in 20th-century inorganic chemistry for describing complex multinuclear compounds.
Heteropoly compounds are industrial superstars—they're used to make fertilizers, clean up pollutants, and catalyze chemical reactions that would otherwise be impossible.
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