gunmetal

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++gun·met·al /ˈɡʌnˌmetl/ noun [uncountable]  1. HCMa dull grey-coloured metal which is a mixture of copper, tin, and zinc 炮铜，炮合金〔铜、锡、锌的合金〕2. a dull blue-grey colour 炮铜色，铁灰色

gun·met·al nounChineseSyllable  

gunmetal
gun‧met‧al /ˈɡʌnˌmetl/ noun [uncountable]
1. a dull grey-coloured metal which is a mixture of copper, tin, and zinc
2. a dull blue-grey colour

gun·metalBrE /ˈɡʌnmetl/ 🔊NAmE /ˈɡʌnmetl/ 🔊 noun [uncountable] a metal that is a mixture of copper, tin and zinc 炮铜，炮合金（铜、锡和锌的合金）a dull blue-grey colour 炮铜色；暗蓝灰色；铁灰色