Definition

A ring-shaped structure or area, often found in nature or mathematics, that can refer to various forms such as growth rings in trees or the space between two circles.

Example

The annulus formed by the two circles was used to calculate the area between them.

Conversation

Did you see that diagram in class about the annulus?

Yeah, I found it pretty fascinating, especially how it relates to circles.

Exactly! The way it shows the area between the two circles is really cool.

I agree, it definitely makes geometry more interesting.

Synonyms & Antonyms

Root Explanation

Annulus → It is derived from the Latin word "annulus" (meaning ring or small ring), which is a diminutive form of "anus" (meaning ring or circle). The word "annulus" refers to a small ring or circular object.

Memory Tip

Think of a small 'ring' ('annulus') — that's why annulus means a small ring or circular shape.

Visually Confused Words