An area of land or the particular features of it.
The surface of the earth; the ground.
A single, distinctive rock formation; an area having a preponderance of a particular rock or group of rocks.
The topographical study of geographic locations or given places in relation to their history.
The properties of a particular technological embodiment that are not affected by differences in the physical layout or form of its application.
The arrangement of nodes in a communications network.
The branch of mathematics dealing with those properties of a geometrical object (of arbitrary dimensionality) that are unchanged by continuous deformations (such as stretching, bending, etc., without tearing or gluing).
Any collection τ of subsets of a given set X that contains both the empty set and X, and which is closed under finitary intersections and arbitrary unions.
The anatomical structure of part of the body.