Terrestrial

adj. of or relating to land (as opposed to water), earthly; of or pertaining or relating to the earth or its occupants; of this world, temporal, mundane

Terrestrial refers to things having to do with the land or with the planet Earth.
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Adjective
1. of or relating to or inhabiting the land as opposed to the sea or air
(synonym) tellurian, telluric, terrene
(pertainym) land, dry land, earth, ground, solid ground, terra firma
2. of or relating to or characteristic of the planet Earth or its inhabitants; "planetary rumblings and eructations"- L.C.Eiseley ; "the planetary tilt"; "this terrestrial ball"
(synonym) planetary
(pertainym) Earth, world, globe
3. operating or living or growing on land
(synonym) land(a)
(antonym) amphibious
4. concerned with the world or worldly matters; "mundane affairs"; "he developed an immense terrestrial practicality"
(synonym) mundane
(similar) worldly
5. of this earth; "transcendental motives for sublunary actions"; "fleeting sublunary pleasures"; "the nearest to an angelic being that treads this terrestrial ball"
(synonym) sublunar, sublunary
(similar) earthly

(n.)
An inhabitant of the earth.
  

(a.)
Representing, or consisting of, the earth; as, a terrestrial globe.
  

(a.)
Of or pertaining to the world, or to the present state; sublunary; mundane.
  

(a.)
Of or pertaining to the earth; existing on the earth; earthly; as, terrestrial animals.
  

(a.)
Consisting of land, in distinction from water; belonging to, or inhabiting, the land or ground, in distinction from trees, water, or the like; as, terrestrial serpents.
  

(a.)
Adapted for the observation of objects on land and on the earth; as, a terrestrial telescope, in distinction from an astronomical telescope.
  

Pertaining to land.