Word Origin & History
copper
O.E. coper, from W.Gmc. *kupar, from L.L. cuprum, contraction of L. Cyprium (æs) "Cyprian (metal)," after Gk. Kyprios "Cyprus." L. æs was originally "copper," but this was extended to its alloy with tin, bronze, and as this was far more extensively used than pure copper, the word's primary sense shifted to the alloy and a new word evolved for "copper," from the Latin form of the name of the island of Cyprus, where copper was mined. Aes passed into Gmc. (which originally did not distinguish copper from its alloys) and became Eng. ore (q.v.). Copperhead (Trigonocephalus contortrix) is 1775, Amer.Eng., poisonous "sneak snakes" (because they bite without warning); said to have been first used in reference to Northerners with Southern sympathies in the New York "Tribune," July 20, 1861, but O.E.D. says it originated in autumn 1862.