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õhu toimel tumenev pehme hõbevalge metall, omadustelt haruldane muldmetall (lantanoid), keemiline element järjenumbriga 57
лантан . Koolisõnastikud 2005–2010. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kool_KV/%D0%BB%D0%B0%D0%BD%D1%82%D0%B0%D0%BD/1/rus (14.08.2026)