| 单词 | copper |
| 释义 | Word Frequency copper 1(ˈkɒpə) noun 1. a. a malleable ductile reddish metallic element occurring as the free metal, copper glance, and copper pyrites: used as an electrical and thermal conductor and in such alloys as brass and bronze. Symbol: Cu; atomic no: 29; atomic wt: 63.546; valency: 1 or 2; relative density: 8.96; melting pt: 1084.87±+0.2°C; boiling pt: 2563°C ▶ Related adjectives: cupric, cuprous ▶ Related prefix: cupro-b. (as modifier) a copper coin 2. a. the reddish-brown colour of copper b. (as adjective) copper hair 3. informal any copper or bronze coin 4. mainly British a large vessel, formerly of copper, used for boiling or washing 5. any of various small widely distributed butterflies of the genera Lycaena, Heodes, etc, typically having reddish-brown wings: family Lycaenidae verb 6. (transitive) to coat or cover with copper Derived forms coppery (ˈcoppery) adjective Word origin Old English coper, from Latin Cyprium aes Cyprian metal, from Greek Kupris CyprusWord Frequency copper 2(ˈkɒpə) noun slang a police officer Often shortened to: copWord origin C19: from cop1 (vb) + -er1 |
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