Source : Webster's Revised Unabridged Dictionary (1913)

Angularity \An`gu*lar"i*ty\, n.
   The quality or state of being angular; angularness.

Source : WordNet®

angularity
     n 1: a shape having one or more sharp angles [syn: {angular shape}]
     2: the property possessed by a shape that has angles [ant: {roundness}]