copper

cop-per · noun

imported

Definitions

noun

  1. 1.

    A reddish-brown metallic element with high electrical conductivity; atomic number 29.

  2. 2.

    A reddish-brown color resembling the metal.

  3. 3.

    (British slang) A police officer.

  4. 4.

    A copper coin of low denomination.

Forms

plural: coppers

Phrases & expressions

  • •
    copper wire — wire made of copper for electrical conduction
  • •
    copper penny — a coin made primarily of copper

Related words

See also: bronze, metal, wire
Synonyms: Cu

Etymology

From Old English coper, from Late Latin cuprum, from Latin Cyprium aes meaning "metal of Cyprus," where copper was mined in ancient times.