Definition from Wiktionary, the free dictionary
Earthan (plural Earthans)
- (rare, science fiction, nonstandard) Of or from planet Earth.
2008, Crystal Jordan, Carnal Desires, page 59:
- When, for unknown reasons, gene-splicing with Earthan reptiles had failed to take, scientists had turned to the sea dragons found on the water world of Aquatilis, home planet of the merpeople.