Definition

The slow movement or change in the direction of the axis of a spinning object, often seen in astronomy and physics, where it affects the position of stars and planets over time.

Example

The precession of the equinoxes affects the timing of the seasons.

Conversation

Did you know that the Earth's axis experiences precession?

I think I've heard about that in my astronomy class.

Yeah, it causes the equinoxes to shift over time.

That's fascinating! I didn't realize it had such a big effect.

Synonyms & Antonyms

Root Explanation

Precession → It is formed from "pre-" (meaning before) and "cedere" (meaning to go or yield). The word describes the act of going before or moving forward in a specific manner, particularly in reference to the gradual shift in the orientation of an astronomical body.

Memory Tip

Think of something that is 'going before' ('pre-') in a specific direction or manner ('cedere') — that's why precession refers to the gradual movement or shift in position.

Visually Confused Words