Learn how to say Terrestrially correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word terrestrial:
1on or relating to the earth:
increased ultraviolet radiation may disrupt terrestrial ecosystems
denoting television broadcast using equipment situated on the ground rather than by satellite:
a fifth terrestrial channel
Astronomy (of a planet) similar in size or composition to the earth, especially being one of the four inner planets.
archaic relating to the earth as opposed to heaven.
2of or on dry land:
a submarine eruption will be much more explosive than its terrestrial counterpart
(of an animal) living on or in the ground; not aquatic, arboreal, or aerial.
(of a plant) growing on land or in the soil; not aquatic or epiphytic.
an inhabitant of the earth.
late Middle English (in the sense ‘temporal, worldly, mundane’): from Latin terrestris (from terra ‘earth’) + -al