property - a basic or essential attribute shared by all members of a class; "a study of the physical properties of atomic particles"

dimensionality - the spatial property of having dimensions; "all matter has dimensionality"

shape, configuration, conformation, contour, form - any spatial attributes (especially as defined by outline); "he could barely make out their shapes through the smoke"

symmetricalness, symmetry, correspondence, balance - (mathematics) an attribute of a shape or relation; exact correspondence of form on opposite sides of a dividing line or plane

asymmetry, imbalance - (mathematics) a lack of symmetry

obliqueness - the property of being neither parallel nor perpendicular, but at a slanting angle