'Circularity' definitions:

Definition of 'circularity'

From: WordNet
noun
The roundness of a 2-dimensional figure [syn: circularity, disk shape]

Definition of 'Circularity'

From: GCIDE
  • Circularity \Cir`cu*lar"i*ty\, n. [LL. circularitas.] The quality or state of being circular; a circular form. [1913 Webster]