Palimpsest

n. parchment or tablet that has been erased for reuse, writing surface that has been used and wiped clean

A palimpsest is a manuscript page, whether from scroll or book that has been written on, scraped off, and used again. The word "palimpsest" comes through Latin from Greek παλιν + ψαω = ("again" + "I scrape"), and meant "scraped again." Romans wrote on wax-coated tablets that could be reused, and a passing use of the rather bookish term "palimpsest" by Cicero seems to refer to this practice.
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Noun
1. a manuscript (usually written on papyrus or parchment) on which more than one text has been written with the earlier writing incompletely erased and still visible
(hypernym) manuscript, holograph

n. palimpsest, parchment or tablet that has been erased for reuse

(n.)
A parchment which has been written upon twice, the first writing having been erased to make place for the second.