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copper

copper


cop·per 1  (kpr)
n.
1. Symbol Cu A ductile, malleable, reddish-brown metallic element that is an excellent conductor of heat and electricity and is widely used for electrical wiring, water piping, and corrosion-resistant parts, either pure or in alloys such as brass and bronze. Atomic number 29; atomic weight 63.54; melting point 1,083°C; boiling point 2,595°C; specific gravity 8.96; valence 1, 2. See Table at element.
2. A coin, usually of small denomination, made of copper or a copper alloy.
3. Chiefly British A large cooking pot made of copper or often of iron.
4. Any of various small butterflies of the subfamily Lycaeninae, having predominantly copper-colored wings.
5. A reddish brown.
tr.v. cop·pered, cop·per·ing, cop·pers
1. To coat or finish with a layer of copper.
2. Slang To bet against, as in faro.

[Middle English coper, from Old English, from Late Latin cuprum, from Latin Cyprium (aes), Cyprian (metal), from Cyprius, of Cyprus, from Greek Kuprios, from Kupros, Cyprus.]

copper·y adj.

cop·per 2  (kpr)
n. Slang
A police officer.

[From cop.]

copper1
n
1. (Chemistry / Elements & Compounds)
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 adjs cupric, cuprous Related prefix cupro-
b.  (as modifier) a copper coin
2. (Fine Arts & Visual Arts / Colours)
a.  the reddish-brown colour of copper
b.  (as adjective) copper hair
3. (Economics, Accounting & Finance / Currencies) Informal any copper or bronze coin
4. Chiefly Brit a large vessel, formerly of copper, used for boiling or washing
5. (Life Sciences & Allied Applications / Animals) any of various small widely distributed butterflies of the genera Lycaena, Heodes, etc., typically having reddish-brown wings: family Lycaenidae
vb
(Engineering / Metallurgy) (tr) to coat or cover with copper
[Old English coper, from Latin Cyprium aes Cyprian metal, from Greek Kupris Cyprus]
coppery  adj

copper2
n
(Law) a slang word for policeman Often shortened to cop
[from cop1 (vb) + -er1]

copper  (kpr)
Symbol Cu
A reddish-brown, ductile, malleable metallic element that is an excellent conductor of heat and electricity. It is widely used for electrical wires, water pipes, and rust-resistant parts, either in its pure form or in alloys such as brass and bronze. Atomic number 29; atomic weight 63.546; melting point 1,083°C; boiling point 2,595°C; specific gravity 8.96; valence 1, 2. See Periodic Table. See Note at element.


copper  /kpr/  n. [U] 1 a brownish red metal and basic chemical element: The pipes in that building are made of copper. 2 slang a police officer See: cop.
adj. related to or made of copper: a copper mine||a copper kettle copper

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