Definition

Describing motion or rotation that moves forward or in the same direction as the main body, often used in astronomy and physics.

Example

The spacecraft was set to follow a prograde orbit around the planet.

Conversation

Did you know that some planets have a prograde rotation?

Really? I thought all of them rotated the same way.

Nope, it varies! Some have a prograde motion while others don't.

That's fascinating! I need to read more about it.

Synonyms & Antonyms

Root Explanation

Prograde → It is formed from "pro-" (meaning forward) and "gradus" (meaning step or degree). The word "prograde" refers to moving forward or in the direction of the motion of the primary body, especially in astronomy.

Memory Tip

Think of moving 'forward' ('pro-') with each 'step' ('gradus') — that's what prograde means.

Visually Confused Words