1. An area or zone on Earth's land surface, characterized by specific geographical, ecological, or climatic features
The Amazon rainforest is one of the most biodiverse terrestrial regions in the world.
A floresta amazônica é uma das regiões terrestres mais biodiversas do mundo.
2. A geographic area or territory on land (as opposed to aquatic or aerial regions)
This terrestrial region experiences extreme temperature variations.
Esta região terrestre experimenta variações de temperatura extremas.