Earthish

Etymology
From.

Adjective

 * 1)  Resembling the Earth; Earthlike.
 * 2)  Relating to or originating from the Earth.
 * 1)  Relating to or originating from the Earth.

Proper noun

 * 1)  A hypothetical universal language of Earth.

Usage notes

 * Note that (uncapitalized) refers to  rather than the planet.