epicyclical

/ˌɛpɪˈsaɪklɪkəl/
adjective
  1. Relating to or resembling an epicycle (a small circle moving along a larger circle), often used in astronomy or geometry.
    • The ancient model of the solar system used epicyclical paths to explain the motion of planets.
    • The artist's design featured epicyclical patterns that seemed to spiral outward.
    • In geometry class, we studied the epicyclical curves created by a point on a rolling circle.
What does "epicyclical" mean? | whatsthatwordmean | whatsthatwordmean