Terrestrial

Terrestrial literally means 'of the earth' and is used in a variety of contexts:

In biology and in the general sense, terrestrial means indicates ground-dwelling (compare aquatic). See land.
In broadcasting terrestrial indicates that TV or radio signals are received through a conventional aerial. See terrestrial television.
In communication networking, "terrestrial" indicates signals travelling through fiber optic cable or copper wire, usually located underground or undersea.
terrestrial may also be used in contrast to extra-terrestrial, indicating creatures from the earth rather than from outer space.

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