Definition of adversaria in English:

adversaria

noun

historical
  • 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.

Pronunciation:

adversaria

/ˌadvəˈsɛːrɪə/