marginalia \mahr-juh-NEY-lee-uh\, noun:
Notes in the margin of a book, manuscript, or letter.
On the huge mahogany table there lay face downward a badly worn copy of Borellus, bearing many cryptical marginalia and interlineations in Curwen's hand.
-- Howard Phillips Lovecraft, S. T. Joshi, The thing on the doorstep and other weird stories
But the scribbled marginalia in Myhre's notebook tells a different tale.
-- "Sweat without the Wet?," Popular Science, Vol. 261, No. 3
Marginalia derives from the Latin marginalis, "the space or edge of something, or something of little importance."
