Lucifer is another name for Satan that only appears once in the Bible, in a passage describing his attempt to usurp God's throne:

--Isaiah 14--(11)Thy pomp is brought down to the grave, and the noise of thy viols: the worm is spread under thee, and the worms cover thee. (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! (13)For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north: (14) I will ascend above the heights of the clouds; I will be like the most High.