from The Century Dictionary and Cyclopedia
- n. The ornamental lining on the inner covers of a sumptuous book. The simpler styles are of silk, velvet, or brocade. Highly decorated books have linings of thin leather, with borders or centerpieces hand-tooled in gold.
- n. In paleontology, the reflexed inferior margin of the carapace in the Trilobita, specially noticeable on the cephalon and pygidium.
But Watteau never signed or dated his work, and not a single scrap of documentary evidence in his own hand survives - save, possibly, the word 'doublure' 'lining' inscribed next to the cape of a male figure in a sketch, which can be seen in the Royal Academy's superb new exhibition.
But the inside of the cover is open to two treatments; it may bear the material either of the outer covering or of the pages within. So it may display, for instance, a beautiful panel of leather--doublure--or it may share with the next page a decorative lining paper; but that next page should never be of leather, for it is the first page of the book.
This word ultimately comes from the Latin 'duplus,' twofold.