ˌdəˈblu̇(ə)r, düˈ- noun
( -s )
Etymology: French, from Middle French, lining of a garment, from doubler to line, double + -ure — more at double
1. : the lining of a book cover ; especially : an ornamental lining (as of tooled leather, painted vellum, or rich brocade)
2. : the reflexed margin of a trilobite's carapace