The Collaborative International Dictionary
Adversaria
Adversaria \Ad`ver*sa"ri*a\, n. pl. [L. adversaria (sc. scripta), neut. pl. of adversarius.] A miscellaneous collection of notes, remarks, or selections; a commonplace book; also, commentaries or notes.
These parchments are supposed to have been St. Paul's
adversaria.
--Bp. Bull.
Wiktionary
adversaria
n. (context pluralonly obsolete English) Originally, a book of accounts, so named from the placing of debt and credit in opposition to each other. A collection of notes or commentaries; a commonplace book.
Usage examples of "adversaria".
Stirpium adversaria nova, but when I wish to consult it I am obliged to wait until my husband or my chaplain or my cousin Richard has time to translate for me.