Palimpsest
From BiblePortal Wikipedia
Webster's Dictionary [1]
(n.) A parchment which has been written upon twice, the first writing having been erased to make place for the second.
Cyclopedia of Biblical, Theological and Ecclesiastical Literature [2]
( Παλίμψηστος , Rubbed Out Again ) , a term applied to ancient manuscripts, of which the older writing has been erased in order to use the parchment or paper for writing on them again. A good specimen is the Wolfenblittel MS. (q.v.).
The Nuttall Encyclopedia [3]
The name given to a parchment manuscript written on the top of another that has been erased, yet often not so thoroughly that it cannot be in a measure restored.