IPA: /ɪkˈskɜːrsəs/
KK: /ɪkˈskɜːrsəs/
A section of writing that goes off-topic to provide additional information or explanation about a subject.
The author included an excursus on the history of the topic to give readers more context.
Excursus is formed from "ex-" (meaning out) and "currere" (meaning to run). The word refers to a running out or a digression from the main topic.
Think of 'running out' ('ex-') from the main topic when you hear 'excursus' — it helps you remember that it means a digression.