(n.) The quality or condition of being rectangular, or right-angled.

S-curve angle angularity angularness bend bending bow bowing conflexure crease creasing crimp crookedness deflection deflexure diffraction diffusion dispersion distortion dog-ear double doubling duplicature flex flexure flounce fold frill gather geanticline geosyncline hairpin turn hookedness inflection lapel lappet meander orthogonality oxbow plica plication plicature ply rectangularity reflection refraction right-angledness right-angularity ruche ruching ruffle scatter skewness sweep torsion tuck turn turning