(Noun) A parchment or other writing surface on which the original text has been effaced or partially erased, and then overwritten by another; a manuscript in which later writing has been superimposed on earlier (effaced) writing.

In Context

“Every visible pen stroke, crease, and blemish of the palimpsest had come under his magnifying glass, until he knew its parchment terrain as intimately as that of his home city.”

Alan Hirshfeld, Eureka Man: The Life and Legacy of Archimedes, 2009.