footnote

US /ˈfʊt.noʊt/
UK /ˈfʊt.noʊt/
"footnote" picture
1.

an additional piece of information printed at the bottom of a page

:
The author included a footnote to explain the historical context.
Please check the footnotes for more details.
2.

a minor or less important part of something

:
His role in the project was merely a footnote.
That incident became a mere footnote in history.
1.

to add a footnote to (a text or document)

:
She decided to footnote the controversial statement.
You should always footnote your sources in academic papers.