PENTAGRAM
The word pentagram comes from the Greek word πεντάγραμμον (pentagrammon), a noun form of πεντάγραμμος (pentagrammos) or πεντέγραμμος (pentegrammos), a word meaning roughly "five-lined" or "five lines".
Pentagrams were used symbolically in ancient Greece and Babylonia and most likely originated from the observations of prehistoric astronomers (When viewed from Earth, successive inferior conjunctions of Venus plot a nearly perfect pentagram shape around the zodiac every eight years).
Christians once commonly used the pentagram to represent the five wounds of Jesus and it also has associations within Freemasonry. A human body superimposed over a pentagram symbolizes the power of spirit and intellect (head) over the physical body or the physical world (four limbs).
The pentagram has long been associated with the planet Venus, and the worship of the goddess Venus, or her equivalent. It is also associated with the Roman word Lucifer, which was a term used for Venus as the Morning Star, associated with the bringer of light and knowledge.