#1966 הֵילֵל heylel {hay-lale'}

 from H1984 (in the sense of brightness); TWOT - 499a; n m

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

 Lucifer = "light-bearer"
 1) shining one, morning star, Lucifer
    1a) of the king of Babylon and Satan (fig.)
 2) (TWOT) 'Helel' describing the king of Babylon

—Brown-Driver-Briggs (Old Testament Hebrew-English Lexicon)

—Strong's (Hebrew & Chaldee Dictionary of the Old Testament)

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

 AV - Lucifer 1; 1

—Exhaustive Concordance (KJV Translation Frequency & Location)