Main Page | See live article | Alphabetical index Terrestrial literally means 'of the earth' and is used in a variety of contexts: In biology, terrestrial means indicates ground-dwelling (compare aquatic). See land. In broadcasting terrestrial indicates that TV or radio signals are received through a conventional aerial (compare satellite television). terrestrial may also be used in contrast to extra-terrestrial, indicating creatures from the earth rather than from outer space. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.