Footnote

(n.) A note of explanation or citation at the foot of a page.

Thesaurus Entries

adversaria, aide-memoire, annotation, apparatus criticus, comment, commentary, commentation, docket, entry, exegesis, gloss, item, jotting, marginal note, marginalia, memo, memoir, memorandum, memorial, minutes, notation, note, note of explanation, register, registry, reminder, scholia, scholium, word of explanation