The Hebrew word is Tziyun (Ẓiyyun), as in:"Ẓiyyun le Nefesh Ḥayyah," novellæ on different Talmudic treatises, viz., Pesaḥim (1784), Berakot (1791), Beẓah (1799), the three republished together in 1824; "Dagul me-Rebabah" (1794), notes on the four ritual codices; "Ahabaṭ Ẓiyyon" (1827), addresses and sermons; "Doresh le-Ẓiyyon" (1827), Talmudic discussion.

The author of these works was Rabbi Ezekiel LANDAU: https://www.sefaria.org/person/Yehezkel%20Landau

Howard Orenstein, Ph.D.
McDaniel College
Westminster, MD 21157