misunderstood words in the Old Testament

The word satan.
I am reviewing one of Kay Arthur's "Lord..." series and got curious about the original word for Satan.
The word "satan" is a Hebrew word and that means "adversary."  The one who opposes is "an adversary" and the word for that is "satan." It is not his name. Then I googled. See 

http://www.blueletterbible.org/lang/lexicon/lexicon.cfm?Strongs=H7854&t=NLT

and

http://www.bibletopics.com/biblestudy/164.htm

The word Lucifer
A couple months ago I learned that the infamous name "Lucifer" is not in the original text when I was curious to see this part in the original language. Did anyone know that? We just assume that one of the fallen angels or the demon's name is Lucifer, but it is not true.See this.

http://www.echoofeden.com/bias/lucifer/