Definition of doublure
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
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Origin and Etymology of doublure
French, from Middle French, lining of a garment, from doubler to line, double + -ure — more at double
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