sidenote n.
1776, from side (adj.) + note (n.).
Examples from the Web for sidenote Contemporary Examples of sidenote
Sidenote: Keeping the Booker election off the November card can’t hurt state and local GOP candidates, either.
Voter Suppression, Chris Christie Style
Michael Tomasky
June 4, 2013
Historical Examples of sidenote
Where the sidenote precedes a paragraph, it is given on a separate line.
John Lawson
Page 85 sidenote: Expression in Painting and Sculpture is a borrowd quality.
A Letter on Shakspere’s Authorship of The Two Noble Kinsmen
William Spalding
Page 147 (sidenote), year changed to years (Dr. Balliet on the early years of childhood).
Mary Schauffler Labaree
Page 189 (sidenote), religous changed to religious (Result to the child of religious acts).
Mary Schauffler Labaree
When the location did not change over several pages, only one sidenote was used.
The Diary of John Evelyn, Volume II (of 2)
John Evelyn