Noun
Syncom (plural Syncoms)
A synchronous communication satellite.
Other synchronous orbits main Syncom 2 Synchronous orbits can only exist for bodies that have a fixed surface (e.g. moons, rocky planets). Source: Internet
Syncom 3 obtained a geosynchronous orbit, without a north-south motion, making it appear from the ground as a stationary object in the sky. Source: Internet