Definition of term:: Joint

  • Joint
    The exterior flexible "hinge" where book cover meets book spine; "hinge" is usually used to designate the equivalent inside or interior flexible area. The joint is often an area that splits or cracks or otherswise shows wear in an older cloth or leather volume.
French: Charnière
German: Gelenk (außen)
Source: What bookdealers really mean. A dictionary by Tom Congalton and Dan Gregory (Between the Covers), with additions from other sources