ὀγδοαδικός
ὀγδοαδικός, belonging to the number eight
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Found the closest form ὀγδοαῖοι. Other nearby forms can be found in the wordwheel, or perhaps try searching again without accents.
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Parsed as:
✓ masculine nominative plural of ὀγδοαῖος
No checked forms of ὀγδοαδικός in the morphology database.