The edge at which a book is sewn together. Rounded, glued spines that were hammered into shape were first introduced in the early sixteenth century. Prior to this, spines were flat, apart from the raised cords. Spines sometimes carry protective extensions at either end known as end tabs.
Dorso; Costa; Schiena; Spina dorsale; Linea dorsaleCostola
Michelle Brown, Understanding Illuminated Manuscripts (Malibu, CA: J. Paul Getty Museum in association with the British Library, c1994).