From the Greek psestos,  which designates a text inscribed on a surface through incising or scratching, which is sometimes synonmous with the word 'graffiti (provided said graffiti are made on parchment), palimpsest
was also named
pergamentus rescriptus or even codex rescriptus by the Latin--

pal-b.GIF (75333 bytes)

then the Medieval-- scholars. Codex rescriptus, of course, referred to a book that was written on top of another book.
In the case of these scholars, the reason
for such a procedure was not at all a 'spirit of deconstruction' in the modern sense of the term.

From the Greek: C. Gandelman