Strong's #2228: e (pronounced ay)
a primary particle of distinction between two connected terms; disjunctive, or; comparative, than:--and, but (either), (n-)either, except it be, (n-)or (else), rather, save, than, that, what, yea. Often used in connection with other particles. Compare especially 2235, 2260, 2273.
Thayer's Greek Lexicon:
̓́
ē
1) either, or, than
Part of Speech: particle
Relation: a primary particle of distinction between two connected terms
Usage:
This word is used 355 times:
Revelation 13:16: "a mark in their right hand, or in their"
Revelation 13:17: "man might buy or sell, save he that had the"
Revelation 13:17: "he that had the mark, or the name of the beast,"
Revelation 13:17: "name of the beast, or the number of his name."
Revelation 14:9: "in his forehead, or in his hand,"