Epicycle

/ˈɛpɪˌsaɪkəl/

noun

A small circle whose center moves around the circumference of a larger one, especially in historical models of the cosmos.

The planets were believed to move in epicycles around the Earth in ancient astronomy.

Neutral

circular motion, celestial mechanics, ancient astronomy

Definition 1 of 2

Pro Tip 1/3

Understanding that epicycles represent historical beliefs in astronomy can provide insight into how scientific thought has evolved.

Ancient astronomers used epicycles to explain the motion of planets.

Pro Tip 2/3

Recognizing that epicycles can represent concepts in mathematics helps in grasping complex system behaviors.

In mathematics, functions can demonstrate epicyclic behaviors through variations.

Pro Tip 3/3

Using 'epicycle' metaphorically can illustrate complicated ideas or situations in modern discussions.

The company’s strategies seemed like an epicycle, repeatedly circling around the root issue.

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