Strong’s Hebrew
H1966 — heylel
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
הֵילֵל
heylel — pronounced hay-lale
from 1984 (in the sense of brightness); the morning-star:--lucifer. see H01984
1 occurrence in the KJV.
Isaiah 14:12
How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations!