tractate

[trak-teyt] /ˈtræk teɪt/
noun
1.
a treatise; essay.
Origin
1425-75; late Middle English < Medieval Latin tractātus, Latin: handling, treatment, equivalent to tractā(re) to handle, treat (frequentative of trahere to draw) + -tus suffix of v. action
British Dictionary definitions for tractate

tractate

/ˈtrækteɪt/
noun
1.
a short tract; treatise
2.
(Judaism) one of the volumes of the Talmud
Word Origin
C15: from Latin tractātus, from tractāre to handle; see tractable