adversaria

noun[plural only]2

1. •
   (treated as plural) A collection of miscellaneous notes, remarks, or fragments of writing, typically preserved in a notebook. Originally, a book of accounts, so named from the placing of debt and credit in opposition to each other.

   • These adversaria provide a fascinating look into the author's drafting process.
2. •
   (no longer used) (treated as singular) A collection of notes or commentaries; a commonplace book.

   • The museum displayed the scientist's primary adversaria under a protective glass case.