armillary sphere, sundial, ogee, equilateral triangle, conic, armillary, convex lens, watchcase, lunette, pilaster, retroreflector, bimetal, oculi, wind vane, openwork, celestial sphere, parabolic reflector, binnacle, parabolic mirror, reflector, isosceles triangle, octahedron, guilloche, ellipsoid, baluster, galvanometer, transept, tubelike, dodecahedron, reredos, parallelogram, tetrahedron, plumb bob, subdial, corbel, iris diaphragm, zodiacal light, quatrefoil, escutcheons, campanile, orb, quoins, diffraction grating, polyhedron, hexagon, semicircles, tachymeter, crenellations, volute, sundog, verdigris, azimuthal, capstan, fresnel lens, tailstock, plastron, newel post, foucault pendulum, millefiori, bevels, zoetrope, circlet, sconce, trapezium, sunray, triangular prism, lamella, earthshine, rhombus, ellipse, fluting, microswitch, semitransparent, collimator, swage, diffracting, tenons, convex, asterism, tesserae, satin stitch, selvage, underglaze, crosshatch, syrtis major, cermet, gothic arch, chamfer, sgraffito, sinusoid, hysteresis loop, astrolabe, hexagram, toroid, metopes, horsehead nebula, fasces, sidereal, spandrels, gobo, cuboid, refracting telescope, turntable, kite, pin, pylons, spindle, spout, aerial, cantilever, cleat, crossbar, easel, obelisk, pylon, rack, sarcophagus, shaft, stud, vane, wheel, antenna, equinoctial, luminous, pillar, alkyl, ammonite, aquamarine, arenaceous, arms, astigmatic, aurignacian, axe, bather, block, blotched, bluish, bond, brim, bulky, c1, calibrated

sundial

sundial

indicator