Centicule
From Geohashing
A centicule is the hundredth part of a graticule when divided into a ten-by-ten grid. Thus, they are as tall as the polar circumference of the Earth divided by 3600, and like graticules vary in width from top to bottom and depending on their position between equator and poles. Centicules can be used to describe a location within a graticule, for example in the Notification program. Some people keep track of which centicules they have visited while hashing, either within a particular graticule or relative to the corner/edge of any/all graticules visited.
You used to be able to use the following website to visualize centicules.
