红铜时代 hóngtóngshídài Chalcolithic Age Origin Definitions Defs Strokes Stroke Words Sentences Sents 红铜 紅銅 hóngtóng copper Pure copper or a copper-based alloy; literally "red copper" because of its reddish-brown color; noted for its high conductivity. Also called 紫铜 zǐtóng or 赤铜 chìtóng时代 時代 shídài noun era a historical period, age, or epoch; often defined by specific political, economic, or cultural conditions