Plural of endnote; multiple notes or citations collected at the end of a document.
From English 'end' plus 'notes,' forming the plural. This collection method became standard in academic publishing to reduce page clutter.
Readers either love or hate endnotes—they're convenient for typesetters but torture for readers who must constantly flip to the back, which is why some consider endnotes the 'we don't respect your reading experience' choice.
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