carbon copy

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A copy of a document made by using carbon paper.
• noun A copy of a document made by using a photocopier or similar mechanism.
• noun A copy of an electronic document sent to people in addition to the addressed recipient.
• noun A person or thing that closely resembles another.
• transitive verb To reproduce (a document) as a carbon copy.
• transitive verb To send (an electronic document) as a carbon copy.
• transitive verb To designate (someone) as the recipient of a carbon copy.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A copy produced in an alternated stack of ordinary sheets of paper and carbon papers. The pression applied on the top sheet (by a pen or typewriter) causes every carbon paper to release its carbon cover, thus reproducing the writing on the subjacent layers of paper.
• noun Any duplicate.
• verb To create a carbon copy of.
• verb Internet make a copy for, send a duplicate to, cc

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a copy made with carbon paper