The canto (Italian pronunciation: [ˈkanto]) is a principal form of division in medieval and modern long poetry. Etymology and equivalent terms. The word canto is derived from the Italian word for "song" or "singing", which comes from the Latin cantus, "song", from the infinitive verb canere, "to sing". In Old Saxon poetry, Old English poetry, and Middle English poetry, the term fitt was sometimes used to denote a section of a long narrative poem, and that term is sometimes used in modern scholarship of this material instead of canto. Form and use.
https://en.wikipedia.org/wiki/Canto