The Collaborative International Dictionary of English v.0.48:
Obliqueness \Ob*lique"ness\, n. Quality or state of being oblique. [1913 Webster]WordNet (r) 3.0 (2006):
obliqueness n 1: the property of being neither parallel nor perpendicular, but at a slanting angle 2: the quality of being oblique and rambling indirectly [syn: deviousness, obliqueness]