Shaktism (Sanskrit: , शाक्तं; lit., 'doctrine of power' or 'doctrine of the Goddess') is a denomination of Hinduism that focuses worship upon Shakti or Devi – the Hindu Divine Mother – as the absolute, ultimate Godhead. It is, along with Shaivism and Vaisnavism, one of the primary schools of devotional Hinduism.
In geometry, a diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. It can also be defined as the longest chord of the circle. Both definitions are also valid for the diameter of a sphere. The word "diameter" is derived from Greek language διάμετρος ( diametros), "diameter of a circle", from δια- ( dia-), "across, through" μέτρον ( metron), "measure". Online Etymology Dictionary It is often abbreviated ..
A circle is a simple closed shape in Euclidean geometry. It is the set of all points in a plane that are at a given distance from a given point, the centre; equivalently it is the curve traced out by a point that moves so that its distance from a given point is constant. The distance between any of the points and the centre is called the radius.