| 单词 | rosette copper |
| 释义 | > as lemmasrosette copper rosette copper n. Metallurgy (now historical) pure copper in the form of rosettes (sense 1). ΚΠ 1609Rozette Copper [see sense 1]. 1797 Encycl. Brit. XI. 467/1 By again sprinkling water on the mass of copper, it is all of it reduced into plates, which are called rosettes, and these plates are what is called rosette-copper. 1846 Jrnl. Statist. Soc. 9 26 Full 7-8ths of the produce of the copper and cobalt mines is exported: the latter in the shape of smalts and oxide of cobalt; the former in cake, sheet, and rosette copper. 1992 R. Barclay Art Trumpet-maker iii. 41 Successive disks were chilled with water, pried up and lifted off with tongs, and quenched in a nearby tub. These disks were known as rosette copper, on account of their shape and colour, and were of remarkable purity. < as lemmas |
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