burelage
/bʊˈrɛlj/ or /bʊˈreɪlɪdʒ/Definitions
1. noun
A layer of paper or other material, often cellulose, that is inserted between the pages of a book or magazine to prevent the sheets from sticking together, typically in a cheap or mass-produced publication.
“The book’s low quality was evident from the presence of a thick burelage between its pages.”