mass noun
1- the chemical element of atomic number 30, a silvery-white metal which is a constituent of brass and is used for coating (galvanizing) iron and steel to protect against corrosion (Symbol: Zn)【化】锌 （化学符号：Zn）。
1.1
- usu. as modifier galvanized iron or steel, especially as the material of domestic utensils or corrugated roofs（用作家庭器皿或屋顶等的）镀锌铁板; 镀锌钢板：
a zinc roof.
镀锌铁皮屋顶。
with obj.［usu. as adj.］(zinced /ˈzɪŋkt/)
- coat (iron) with zinc or a zinc compound to prevent rust（为防锈而）镀锌于（铁）。
词源
mid 17th cent.: from German Zink, of unknown origin.