Various different symbols are used by Wiccans, similar to the use of the crucifix by Christians or the Star of David by Jews. The most notable of these is the pentagram, which has five points, each representing one of the five classical elements in Wicca (earth, air, fire, water and spirit) and also the idea that the human, with its five appendages, is a microcosm of the universe. Other symbols that are used include the triquetra and the triple Moon symbol of the Triple Goddess.
The pentagram is the symbol most commonly associated with Wicca in modern times. It is often circumscribed depicted within a circle and is usually (though not exclusively) shown with a single point upward. The inverse pentagram, with two points up, is a symbol of the second degree initiation rite of traditional Wicca; some Wiccans have alternatively been known to associate the inverted pentagram with evil. In geometry, the pentagram is an elegant expression of the golden ratio phi which is popularly connected with ideal beauty and was considered by the Pythagoreans to express truths about the hidden nature of existence.
Triquetra (IPA: [tyaj'kwµtyY]) is a word derived from the Latin tri- ("three") and quetrus ("cornered"). Its original meaning was simply "triangle" and it has been used to refer to various three-cornered shapes. Nowadays, it has come to refer exclusively to a certain more complicated shape formed of three vesicae piscis, sometimes with an added circle in or around it. This widely recognized symbol has been used in for the past two centuries a sign of special things and persons that are threefold.
Modern Pagans use the triquetra to symbolize a variety of concepts and mythological figures. Germanic Neopagan groups who use the triquetra to symbolize their faith generally believe it is originally of Norse and Germanic origins. Celtic Reconstructionist Pagans use the triquetra either to represent one of the various triplicities in their cosmology and theology (such as the tripartite division of the world into the realms of Land, Sea and Sky), or as a symbol of one of the specific triple Goddesses, for example, The Morrígan.