sections, section, projection, surface, form, projections, shape, texture, curves, surfaces, curve, frustum, passing, figure, spire, tips, cornea, tip, proj, orbit, passes, teeth, textures, equation, points, hands, intersect, domains, shell, arc, arcs, hills, tangent, chain, distributions, roof, spiral, orbits, splines, fingers, pass, envelope, invariant, shapes, glass, mirror, tube, hill, locus, constants, mountain, brown, base, mound, cap, segments, ligament, node, lie, angle, geometry, fitting, mountains, mirrors, fig, touches, pit, frustums, roofs, hyperbola, motion, medium, approximation, parabola, segment, nodes, dessert, trajectories, fection, ranges

central, nondegenerate, absolute, degenerate, focal, same, general, proper, imaginary, fixed, fundamental, simple, real, singular, spherical, second, conformal, oblong, auxiliary, unique, third, variable, corresponding, inscribed, equidistant, point, elongate, oblate, arbitrary, polar, osculating, double, original, nonsingular, smooth, complex, roundish, hyperbolic, elliptic, standard, reciprocal, patched, confocal, bifocal, projective, area, nodal, operculum, called, noncentral, pseudo