1Usually in form earth side. The earthly, as opposed to spiritual, side or aspect of something; the side based on or facing earth.
Without article. A group or department based on the planet earth; the planet earth.
On or towards the planet earth.
Of, relating to, or from the planet earth.
Mid 19th century; earliest use found in Elizabeth Barrett Browning (1806–1861), poet and writer. From earth + side.