satellite sat·el·lite (sāt'l-īt')
A minor structure accompanying a more important or larger one.
A short segment of a chromosome separated from the rest by a constriction, typically associated with the formation of a nucleolus.
A colony of microorganisms whose growth in culture medium is enhanced by certain substances produced by another colony in its proximity.
Any object in orbit about some body capable of exerting a gravitational (see gravitation) force. Artificial satellites in orbit around the Earth have many uses, including relaying communication signals, making accurate surveys and inventories of the Earth's surface and weather patterns, and carrying out scientific experiments.