Ключевые слова: basic, border, centrifuge, circle, circular, concentric, curve, cycle, cyclic, dashed, element, face, geometric, geometrical, geometry, gyration, gyre, icon, intermittent, line, linear, motif, orbit, radial, radiating, radius, revolve, ring, rotary, rotate, rotating, rotation, rotund, round, segmented, segments, shape, simple, sonar, spinning, spire, swirl, symbol, torsion, twist, vortex, whirl, whirligig, whirlpool,