Strong's #4220: poteron (pronounced 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:--whether.
Thayer's Greek Lexicon:
́
poteron
1) which of two
Part of Speech: conjunction
Relation: neuter of a comparative of the base of G4226
Usage:
This word is used 1 times:
John 7:17: "of the doctrine, whether it be of God, or"