化か学がく的てき酸さん素そ要よう求きゅう量りょうかがくてきさんそようきゅうりょうじ字FuriganaMeanings1nounchemical oxygen demand; CODTechnical term used in environmental chemistry and water quality analysis. Often abbreviated as COD.この河か川せんの化か学がく的てき酸さん素そ要よう求きゅう量りょうは基き準