noun

1. An inhabitant of the Earth.

Synonyms: Earthling, Terran

adjective

1. Of or relating to the earth; (specifically) inhabiting planet Earth as opposed to other planets.

2. Of a mineral: containing tellurium.

Synonyms: earthly, telluric, terrene, terrestrial

noun

1. An instrument used to show how the rotation of the Earth on its axis and its orbit around the Sun cause day and night and the seasons.