initially, a book of records, so named from placing of debt and credit in opposition to each other. A collection of notes or commentaries; a commonplace book.
noun-plural:
A miscellaneous number of records, remarks, or alternatives; a commonplace book; additionally, commentaries or notes.
others:
A miscellaneous collection of notes, remarks, or choices; a commonplace-book; memoranda or annotations.
How would you define adversaria?