copperplate
n polished copper plate on which designs, etc are engraved 铜凹版(镌刻有图案等的抛光铜板). ,copperplate `writing, handwriting (also copperplate) neat old-fashioned formal handwriting with looped sloping letters that are joined to each other 铜版体(一种老式手写体, 笔画匀称、 倾斜、 互相连接).