What is marginalia?

marginalia meaning in Information Science terminology / glossary / dictionary is:

Latin for “things in the margin.” Headings or notes printed in the margins of a page, usually in type of a size orstyle distinct from that of the text. Marginalia include footnotes, side notes, and shoulder notes. Also included are glosses, annotations, diagrams, doodles, etc., added by a commentator or reader. In manuscripts, corrections are sometimes made in the margins. In the case of medieval manuscripts and incunabula, the term includes notes and commentary written in the margins (see this 12th-century example) but not ornamental borders and other marginal decoration. Marginalia can be seen in abundance by paging through the 13th-century Lothian Bible (Morgan Library, MS M.791).


reference: ABC-CLIO