This is the 5479th most frequent Portuguese word.
terrestre
"Terrestre" means "relating to the Earth or land; earthly."
Here, "terrestre" is used as an adjective to describe "life" in relation to the land or earth.
A vida terrestre depende de recursos naturais.
Terrestrial life relies on natural resources.
In this context, "terrestre" modifies "vehicle" to indicate that it is suitable for use on land as opposed to air or water.
O veículo terrestre foi projetado para terrenos difíceis.
The terrestrial vehicle was designed for rugged terrains.
"Terrestre" is used to specify that the biodiversity being referred to is that of land ecosystems.