#1023 βραχίων brachion {brakh-ee'-own}

 properly, comparative of G1024, but apparently in the sense of
    brasso (to wield); TDNT - 1:639,110; n m

—Greek Word Study (Transliteration-Pronunciation Etymology & Grammar)

 1) the arm
    1a) the arm of God is a Hebrew idiom for the might and
        the power of God

—Thayer's (New Testament Greek-English Lexicon)

—Strong's (Greek Dictionary of the New Testament)

—NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries

 AV - arm 3; 3

—Exhaustive Concordance (KJV Translation Frequency & Location)