Azimuth Circle (n): 1. A navigational device for measuring azimuths, consisting of a graduated ring equipped with a sighting vane on each side, which fits concentrically over a compass. 2. One of the great circles of the celestial sphere intersecting each other in the zenith & nadir. 3. Three ancient stone circles rumored to be located in The Amazon Basin, The Karakoram Mountian Range, and an un-named island in the South Pacific that were used in sacred marriage rituals by ancient tribes.