spadia
n.— «About 15 years ago, in response to advertiser requests, comic section printers began using the smaller sheet of newsprint to wrap around the comics section. In the newspaper business this sheet is known as a spadia or gatefold. » —“Advertisers enthusiastic about color ads on Sunday comics” The Gazette (Colorado Springs, Colo.) June 4, 2004. (source: Double-Tongued Dictionary)
Further reading
Twice a day the River Thames recedes, revealing a muddy shoreline. Hobbyists known as mudlarks stroll the surface searching for objects that have found their way into the river over the centuries, everything from ancient Roman jewelry to modern...
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...