great circle

great circle
    n 1: a circular line on the surface of a sphere formed by
         intersecting it with a plane passing through the center
    

55 Moby Thesaurus words for "great circle":
      anklet, aphelion, apogee, armlet, astronomical longitude,
      autumnal equinox, band, belt, bracelet, celestial equator,
      celestial longitude, celestial meridian, cincture, cingulum,
      circle, collar, collarband, colures, earring, ecliptic, equator,
      equinoctial, equinoctial circle, equinoctial colure, equinox,
      fascia, fillet, finger ring, galactic longitude,
      geocentric longitude, geodetic longitude, girdle, girt, girth,
      heliocentric longitude, hoop, longitude, meridian, neckband,
      necklace, nose ring, orbit, perigee, perihelion, period, quoit,
      ring, small circle, solstitial colure, trajectory, vernal equinox,
      wristband, wristlet, zodiac, zone