The state or characteristic of being synchronous or synchronized.

Happening at the same time; synchronous.

A satellite orbit where the orbital period is equal to, or multiples of, the Earth’s rotational period; i.e. making one, two, three, etc., orbits in a 24-hour period. Examples include geosynchronous (period equals Earth's rotation), semisynchronous (two orbits per day); and geostationary (geosynchronous orbit where satellite maintains a fixed position on the equator).

An electric motor whose rotation is synchronized with the frequency of the supplied current

plural of synchronous orbit

(electronics) The frequency of rotation of the magnetic field inside an AC induction motor.

plural of synchronous motor

plural of synchronous speed

(astrodynamics) A nearly polar orbit in which a satellite passes over the surface of a planet maintaining the same local mean solar time.

plural of sun-synchronous orbit