The crossword solution for the term 'Illuminati Symbol' is 'EYE', which is a three letter word. The EYE of Providence, also known as the all-seeing EYE, is an ancient symbol that has been used by many cultures throughout history. It is most commonly associated with the Illuminati, a secret society that was founded in the 18th century. The EYE of Providence is believed to represent the omniscience of God, and it is often depicted with a triangle or pyramid beneath it.