Geosynchronous Orbit

A geosynchronous orbit is an orbit around the Earth with an orbital period matching the Earth's sidereal rotation period. This synchronization means that for an observer at a fixed location on Earth, a satellite in a geosynchronous orbit returns to exactly the same place in the sky at exactly the same time each day. The special case of a geosynchronous orbit that is circular and directly above the equator is called a geostationary orbit.
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Noun
1. a circular orbit around the Earth having a period of 24 hours
(hypernym) orbit, celestial orbit
(hyponym) geostationary orbit

Any orbit about the Earth, which orbit has a period equal to the period of rotation of the Earth about its axis, and in the same sense, i.e., direction, as the rotation of the Earth.