E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A size of paper between royal and crown. Its size is 22 1/2 in. x 17 1/2 in. It is from the French word demi (half), and means demi-royal (a small royal), royal being 25 in. x 20 in. The old watermark is a fleur-de-lis.
A Demy of Magdalene College, Oxford, is a superior sort of scholar, half a Fellow.