Bible Dictionaries
Doublure

Webster's Dictionary

(1):

(n.) The reflexed margin of the trilobite carapace.

(2):

(n.) The lining of a book cover, esp. one of unusual sort, as of tooled leather, painted vellum, rich brocade, or the like.

Bibliography Information
Webster, Noah. Entry for 'Doublure'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​d/doublure.html. 1828.