#2303 θεῖον theion {thi'-on}

 probably of G2304 (in its original sense of flashing); TDNT - 3:122,*; n n

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

 1) brimstone
    1a) divine incense, because burning brimstone was regarded as having
        power to purify, and to ward off disease

—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 - brimstone 7; 7

—Exhaustive Concordance (KJV Translation Frequency & Location)