What does it mean?!

I went to dictionary.com in the vain attempt to find a definition for "perelandra." It kept trying to send me to things that had nothing to do with C.S. Lewis, so I decided to look up Venus. Obviously, Venus was a beautiful woman and because of that, and what Dr. Mitchell said about how we attribute female characteristics to Venus, it became clear why all of the definitions talked about beauty and lushness. Just thought someone might like to know that.