'Perpendicularity' definitions:

Definition of 'perpendicularity'

From: WordNet
noun
The relation of opposition between things at right angles [syn: orthogonality, perpendicularity, orthogonal opposition]
noun
The quality of being at right angles to a given line or plane (especially the plane of the horizon)

Definition of 'Perpendicularity'

From: GCIDE
  • Perpendicularity \Per`pen*dic`u*lar"i*ty\, n. [Cf. F. perpendicularit['e].] The quality or state of being perpendicular. [1913 Webster]