Abbott-Smith Manual Greek Lexicon
πότερος (G4220)
1 πότερος , -α, -ον , which of two . Neut., adverbially, πότερον , whether : Jo 7:17 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain
Strong's G4220 · Greek
πότερον
poteron · pot'-er-on
neuter of a comparative of the base of 4226; interrogative as adverb, which (of two), i.e. is it this or that