σφαίρειος

Alas! Could not find the search term σφαίρειος.
Found the closest form σφαιρέων. Other nearby forms can be found in the wordwheel, or perhaps try searching again without accents.

Morpho works with a static database. If you like, you can compare the output of Morpheus.

Parsed as:

feminine genitive plural of σφαῖρα