undertext

Noun

 * 1) Text situated below overlying text, such as on a palimpsest.
 * 2) * 2007, Reviel Netz & William Noel, The Archimedes Codex: How a Medieval Prayer Book is Revealing the True Genius of Antiquity's Greatest Scientist, Da Capo Press (2007), ISBN 9780786745388, unnamed page:
 * The problem is that many of the letters in the undertext of the Palimpsest cannot be read,