epicyclic

• صفة قديمة تتعلق بالتدوير أو التداوير، وهي دوائر صغيرة مراكزها تدور على دوائر أكبر؛ استُخدمت تاريخياً في علم الفلك البطلمي.

An obsolete adjective relating to an epicycle or epicycles; used historically in Ptolemaic astronomy to describe a small circle whose center moves around the circumference of a larger one.

1. C2formaltechnical

   Of or relating to an epicycle, which is a small circle whose center moves along the circumference of a larger circle, used in ancient astronomy to explain planetary motion.

   متعلق بالفلك التدويري

   • The epicyclic model was used by Ptolemy to describe the paths of planets.
   • Epicyclic gears are used in some mechanical systems to achieve complex rotations.
   • The ancient astronomers calculated epicyclic orbits to predict celestial movements.

   المرادفاتepicyclical