excursus
[noun]
Synonyms: digression, aside, discursion, divagation, excursion, parenthesis

[TahlilGaran] English Synonym Dictionary ▲

excursus noun. [ɪk'skǝ:sǝs, ɛk-] Pl. excursuses, excursus [-su:s]. E19.
[Latin = excursion, formed as EXCURSE.]
1. A fuller treatment in an appendix of some point in the main text of a book, esp. an edition of the classics. E19.

2. A digression within a narrative in which some point is discussed at length. M19.

[TahlilGaran] English Dictionary ▲