A masekhet (Hebrew: מַסֶּכֶת, Sephardic: /mɑːˈsɛxɛt/, Ashkenazic: /mɑːˈsɛxɛs/; plural masekhtot מַסֶּכְתּוֹת) is an organizational element of Talmudic literature that systematically examines a subject, referred to as a tractate in English.
A tractate/masekhet consists of chapters (perakim; singular: פרק perek or pereq).