Coarse sandpaper, a form of paper where an abrasive material has been fixed to its surface, allowing rapid removal of material by rubbing.
Coarse structure, on a set X is a collection of subsets of the cartesian product X × X with certain. properties which allow the large-scale structure of metric spaces and topological spaces to be defined. Used in the mathematical fields of geometry and topology.
Coarse woody debris (CWD), a term used for the dead trees left standing or fallen, including branches on the ground.