Wiktionary
pointillé
n. A style of finishing consisting of dotted lines and curves on the covers of a book.
Wikipedia
Pointillé
Pointillé is a decorative technique in which patterns are formed on a surface by a means of punched dots. The technique is similar to embossing or engraving but is done manually and does not cut into the surface being decorated. Pointillé was commonly used to decorate arms and armor starting in the fifteenth century 1. The Holy Thorn Reliquary in the British Museum, made in France at the end of the 14th century, has very fine and delicate pointillé work in gold.
Usage examples of "pointille".
The eleven guardsmen who lined the seat astern, fading like so many ghosts into its pointille upholstery, owed their near invisibility to the catoptric armor of my own Praetorians.