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Skeuomorph: a derivative object that retains ornamental design cues to a structure that was necessary in the original
Word of the day:
http://en.wikipedia.org/wiki/Skeuomorph
As seen here:
http://www.guardian.co.uk/technology/2012/feb/20/monday-note-apple-mountain-lion
Also, see here:
http://www.usabilitypost.com/2011/02/09/skeuomorph/