Figuring is the process of final polishing of an optical surface to remove imperfections or modify the surface curvature to achieve the shape required for a given application. ==Types of figuring== An example of figuring is that used in reflecting telescope primary mirrors in a process of converting the smooth spherical mirror produced by earlier ... Found on http://en.wikipedia.org/wiki/Figuring
The general term given to the patterns formed by wood grain. These often beautiful patterns occur as the result of stress during the tree's life or burrs and bulges on the trunk. Found on http://www.encyclo.co.uk/local/21356