carboncopysheet

noun
UK /ˈkɑːbən ˈkɒpi ʃiːt/
US /ˈkɑːrbən ˈkɑːpi ʃiːt/

A special thin paper that makes a copy of what you write on the paper above it.

She put a carboncopysheet between the two pages so the note was copied twice.


OTHER MEANINGS

2. A sheet used to make a duplicate of a typed or handwritten document.

The clerk slipped a carboncopysheet into the typewriter before typing the invoice.

3. A page in a book of forms that transfers writing to the page beneath.

Tear out the carboncopysheet carefully so the receipt stays clean.

4. A thin dark sheet placed between papers to transfer pressure marks.

He pressed hard with the pen so the carboncopysheet would leave a clear mark.