This root form (lemma) is used in 2 different forms in the NT: σταδίων (GNP), σταδίῳ (DNS).
It is glossed in 2 different ways: ‘a stadium’, ‘stadion_\add measure\add*s’.
OET 1COR 9:24 Greek word=σταδίῳ (stadiōi) Morphology=DNS English gloss=‘a stadium’ SR GNT 1COR 9:24 word 6
OET REV 21:16 Greek word=σταδίων (stadiōn) Morphology=GNP English gloss=‘stadion_\add measure\add*s’ SR GNT REV 21:16 word 25