noun
: a ridge across the backbone of a hand-sewn book produced when the cords or bands are not sawed in ; also : a similar ridge raised on a machine-sewn book by applying a heated die — compare sunken cord
noun
: a ridge across the backbone of a hand-sewn book produced when the cords or bands are not sawed in ; also : a similar ridge raised on a machine-sewn book by applying a heated die — compare sunken cord
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012