skeuomorph

A skeuomorph, pronounced /ˈskjuːəmɔrf/ SKEW-ə-morf, or skeuomorphism (Greek: skeuos—vessel or tool, morphe—shape) is a derivative object which retains ornamental design cues to a structure that was necessary in the original. Skeuomorphs may be deliberately employed to make the new look comfortably old and familiar, such as copper cladding on zinc pennies or computer printed postage with circular town name and cancellation lines.