memorandum
Concise Oxford English Dictionary © 2008 Oxford University Press:
memorandum/meməˈrandəm/
▶noun (pl. memoranda or memorandums) a written message in business or diplomacy.
■ a note recording something.
■ Law a document recording the terms of a transaction.
– origin ME: from L., lit. ‘something to be brought to mind’, gerundive of memorare.
'memorandum' also found in these Oxford entries:

