Stencil n. A thin plate of metal, leather, or other material, used in painting, marking, etc. The pattern is cut out of the plate, which is then laid flat on the surface to be marked, and the color brushed over it. Called also stencil plate.
... the painter tied around some willow that offers a helping root. Within a stone's throw, under a great branching of gnarled trees, is a nook where the curious sun, peeping at you through the interlaced leaves, will stencil Japanese shadows on your white umbrella. Then the trap is unstrapped, the stool opened, the easel put up, and you set your palette. The critical eye with which you look over your brush-case and the care with which you try each feather point upon your thumb-nail are but ... — Modern Prose And Poetry; For Secondary Schools - Edited With Notes, Study Helps, And Reading Lists • Various