“The ouroboros or uroboros is an ancient symbol depicting a serpent or dragon eating its own tail. Originating in ancient Egyptian iconography, the ouroboros entered Western tradition via Greek magical tradition and was adopted as a symbol in Gnosticism and Hermeticism and most notably in alchemy. The term derives from Ancient Greek from ‘oura’ – ‘tail’ plus ‘boros’ -‘eating’. The ouroboros is often interpreted as a symbol for eternal cyclic renewal or a cycle of life, death, and rebirth.”
-Wikipedia
The Pocket Universe 