Definition:Diameter


 * Geometry:
 * Diameter of a Circle
 * Diameter of a Sphere
 * Diameter of a Central Conic
 * Diameter of a Parallelogram
 * Diameter of a general Geometric Figure


 * Topology:
 * Diameter of Bounded Metric Subspace


 * Graph Theory:
 * Diameter of Graph

Also see

 * Definition:Radius
 * Definition:Circumference