* Terrestrial planets: Planets like Earth, Mars, Venus, and Mercury that are primarily rocky and solid, as opposed to gas giants like Jupiter and Saturn.
* Terrestrial ecosystems: Environments on Earth, such as forests, deserts, oceans, and grasslands.
* Terrestrial animals: Animals that live on land, as opposed to aquatic or aerial animals.
* Terrestrial radiation: Radiation emitted from the Earth's surface, as opposed to solar radiation from the sun.
Essentially, "terrestrial" acts as a synonym for "Earthly" or "of the Earth" in a scientific context.
