adversaria
/ˌadvəˈsɛːrɪə/Now chiefly historical
noun
Treated as plural: miscellaneous remarks and observations; notes, miscellanea. With singular concord: a book consisting of these, a commonplace book.
Origin
Late 16th century. From classical Latin adversāria things written on one side of the page, notes, observations (Cicero), in post-classical Latin also commonplace book, use as noun (short for scripta adversāria) of neuter plural of adversārius.