Third-person singular simple present indicative form of copper-fasten

A narrow chisel adapted for cutting a groove.

plural of cope chisel

(mineralogy) The mineral azurite.

(programming) A proxy that controls the copying of an object by deferring the copy until it is required by a client.

plural of copy-on-write proxy

(cryptography) A method of rearranging plaintext before encryption by breaking it into two parts and inverting their order, so as to conceal obvious headers, salutations, signatures, etc.

plural of copper shark

(US, historical, slang) A northerner who sympathized with the South or wanted to end hostilities during the American Civil War. / (US, historical, derogatory) Any member of the Democratic party.

(inorganic chemistry) Group 11 of the periodic table, comprising copper, silver, gold and roentgenium