deckle edge

noun
1.
the irregular, untrimmed edge of handmade paper, often used for ornamental effect in fine books and stationery, now often produced artificially on machine-made paper.
Also called deckle.
Origin
1870-75
British Dictionary definitions for deckle edge

deckle edge

noun
1.
the rough edge of handmade paper, caused by pulp seeping between the mould and the deckle: often left as ornamentation in fine books and writing papers
2.
a trimmed edge imitating this
Derived Forms
deckle-edged, adjective