aide-memoire

 
Pronunciation: /ˌeɪd mɛmˈwɑː, ɛd mɛmwaʀ/

noun (plural aides-memoires or aides-memoire pronunc. )

  • 1an aid to the memory, especially a book or note.
  • 2an informal diplomatic message.

Origin:

mid 19th century: from French aide-mémoire, from aider 'to help' and mémoire 'memory'