"copperplate" in the noun sense
1. copperplate
a graceful style of handwriting based on the writing used on copperplate engravings
2. copperplate
a print made from an engraved copperplate
3. copperplate, copperplate engraving
an engraving consisting of a smooth plate of copper that has been etched or engraved
Source: WordNet® (An amazing lexical database of English)
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