Definition

A long, narrow groove or channel found on the surface of the moon or other planets.

Example

The lunar rille was clearly visible in the telescope's view.

Conversation

Have you ever noticed that long rille on the moon's surface?

Yeah, I saw a documentary about it last week!

It's fascinating how those rilles form over time.

Definitely! They make the moon look so unique.

Synonyms & Antonyms

Root Explanation

The word 'rille' originates from Old French 'rille', meaning a small channel or groove. It refers specifically to a narrow, elongated depression or furrow.

Memory Tip

Think of a small 'channel' or 'groove' when you hear 'rille', as it directly describes a narrow depression.

Visually Confused Words