Geosynchronous

Definition
Geosynchronous refers to an orbit around the Earth with an orbital period that matches the Earth's sidereal rotation period. The synchronization of rotation and orbital period means that for an observer on the surface of the Earth, the satellite appears to constantly hover over the same meridian (north-south line) on the surface, moving in a slow oscillation alternately north and south with a period of one day, so it returns to exactly the same place in the sky at exactly the same time each day.