ouroboros

noun2

1. •
   A serpent, dragon or worm that eats its own tail, a representation of the continuous cycle of life and death.
2. •
   Anything of a circular or recursive nature.

   • Like an ouroboros, the story created and informed by the writer’s own experience suddenly flipped back on itself, Childress’s life now reflecting the story rather than the other way around. — 2019