skiamorph
n.— «I got the word, and the concept behind it, from a book on materials science that I long ago mislaid. “Skiamorph” comes from the Greek for “shadow” (skia) and “form” (morphe). My long-lost book coined it for the unnecessary holdovers that show up when new technologies displace existing ones.» —“One person’s Rolodex is another person’s electronic skiamorph” by Bill Atkinson Gloe and Mail (Toronto, Can.) Feb. 10, 1996. (source: Double-Tongued Dictionary)