Meaning of carbon paper

car'bon pa"per

Pronunciation: [key]
  1. paper faced with a preparation of carbon or other material, used between two sheets of plain paper in order to reproduce on the lower sheet that which is written or typed on the upper.
  2. Also calleda paper for making photographs by the carbon process.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.