G1887 ἐπαύριον (epaúrion)

KJV renderings: day following, morrow, next day (after)
Strong's definition: occurring on the succeeding day, i.e. (G2250 (ἡμέρα) being implied) to-morrow
Derivation: from G1909 (ἐπί) and G839 (αὔριον);

From James Strong's public-domain dictionaries (G), JSON edition by OpenScriptures (CC-BY-SA). Every dotted-underline word in the text links here.