| 单词 | copper |
| 释义 | copper 1. n., adj., & v. --n 1. Chem. a malleable red-brown metallic element of the transition series occurring naturally esp. in cuprite and malachite, and used esp. for electrical cables and apparatus. Usage Symb.: Cu. 2. a bronze coin. 3. a large metal vessel for boiling esp. laundry. 4. any of various butterflies with copper-coloured wings. --adj made of or coloured like copper. --vtr. cover (a ship's bottom, a pan, etc.) with copper. Phrases and idioms copper beech a variety of beech with copper-coloured leaves. copper belt a copper-mining area of Central Africa. copper-bit a soldering tool pointed with copper. copper-bottomed 1. having a bottom sheathed with copper (esp. of a ship or pan). 2. genuine or reliable (esp. financially). copper pyrites a double sulphide of copper and iron: also called CHALCOPYRITE. copper sulphate a blue crystalline solid used in electroplating, textile dyeing, etc. copper vitriol copper sulphate. Etymology: OE copor, coper, ult. f. L cyprium aes Cyprus metal 2. n. Brit. sl. a policeman. Etymology: COP(1) + ER(1) |
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