perpendicularity Definition

orthogonal opposition, orthogonality, coordinate axis, magnetic dip, concentricity, straightness, brachypinacoid, plane angle, horizontalness, verticalness, centerline, orthopinacoid, interior angle, clinopinacoid, squareness, angle of refraction, spherical angle, clinodiagonal, decussative, pinacoid, angle of incidence, macropinacoid, centre of curvature, exterior angle, centreline, solid angle, bisectrix, reclination, radius of curvature, angle of reflection, orthodiagonal, antiparallelogram, planarity, polar coordinate, tangent plane, cross of lorraine, ellipsoid of revolution, vertilinear, orthocentre, subtangent, flatness, angle, conic section, magnetic lens, vector product, curvature, brachydome, obliquation, regular polygon, polar equation, axis, radial symmetry, declinator, euclidean space, semimajor axis, spatial property, tacnode, right triangle, line of latitude, abscissa, brachydiagonal, interaxis, minor axis, sectant, central angle, lissajous figure, angulous, horizontality, complementary angle, circination, angular distance, angulometer, bisector, agonic, peritomous, critical angle, major axis, gyroidal, repeatability, rectangularity, orbital plane, subtense, latus rectum, linearity, spheroconic, hemihedral, angularity, axial, isocline, chamfer, transvection, levelness, parallelism, decussatively, helictite, oblique angle, macrodiagonal, azimuthal, workpiece, transvert,