Wiktionary
a. Of or from the planet Earth. n. 1 A person from planet Earth. 2 (context nonstandard English) A language from Earth.
Wikipedia
is a shōnen-ai manga by Yun Kouga about angel watchers of earth which was made into a J.C.Staff-produced anime OVA. The angels' roles are to assess the progress of humans giving them positive and negative scores based on their everyday actions. The angels, who have deemed that the Earthian are becoming far too destructive, decide that if the Earthian reach 10,000 negative marks instead of positive, then their world will be destroyed. While there are many sets of positive/negative partner teams that have descended to the Earth to carry out their investigations, the story focuses on a single pair that, due to the carelessness (or perhaps over-caring nature) of one, causes both to end up in trying circumstances multiple times throughout their stay on Earth...
There are four OVAs total, three of which continue the same plot, and another that delves into a separate side story. All of them coincide with the original manga.
Usage examples of "earthian".
And speaking of knowledge, what about all the learning of an Earthian extraterrestrialogist he acquired in the bargain?
All I shall require are facilities for unescorted travel and interpreter speaking Earthian language.
Sheldon told the chief about knives and forks and spoons, about cups, about chairs, pockets in trousers and coats, clocks and watches, the theory of medicine, the basics of astronomy, and the quaint Earthian custom of hanging paintings on a wall.
I can believe your people came here to preserve Earthian species that were in danger of extinction.
The chronometer that showed both Earthian and Martian time, the days of the month, the phases of the moon.
Eventually the drug is found to be a common Earthian herb, theretofore innocently supplied by an Earthian named Wing, who received in return for small quantities of it many pounds of rare and precious metals.
I dismounted from the stool, anxious to get to the Strumbermian higher councils and prove that Earthians were True Humanoids.
If Earthians do not have the courage to re-examine their own standards and conduct, they cannot petition for admittance to galactic affairs.
You must remember that your people are from Earth and that Earthians have never been entirely logical.
Venusians now threaten us, and the Earthians may come later since they are most fortunate in resources for space-flight.
If I had been Earthian, I would have blushed to recall them, wishing them gone, and worse: wishing dead all other individuals, the inceptors, the receptors, the nootchi, who had witnessed the events.