tractate
noun
trac·tate ˈtrak-ˌtāt 
: treatise, dissertation
Example Sentences
Recent Examples on the Web For cognoscenti, this is page 59b of tractate Bava Metzia. 
National Geographic, 15 Oct. 2019 The play’s plot comes from the Talmud tractate Gittin, which primarily deals with laws related to divorce. Josefin Dolsten, sun-sentinel.com, 5 Sep. 2019
National Geographic, 15 Oct. 2019 The play’s plot comes from the Talmud tractate Gittin, which primarily deals with laws related to divorce. Josefin Dolsten, sun-sentinel.com, 5 Sep. 2019 Word History
Etymology
Latin tractatus, from tractare to draw out, handle, treat — more at treat entry 1
First Known Use
15th century, in the meaning defined above