C / conjectānĕa
noun

conjectānĕa

gen. conjectāneōrum · gender neuter · decl. 2nd
a memorandum-; commonplace-book, a title of works of miscellaneous contents
a memorandum- or commonplace-book, a title of works of miscellaneous contents, Gell. praef. § 9; 6, 5, 1; 14, 7, 13.