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annulus

Pronunciation: [ˈæn.jʊ.ləs]

Word

Learn how to use annulus in a sentence: 6 audio examples across 2 meanings.

Context: “geometry”

(noun) an annulus is a ring-shaped object. It looks like a circle with a hole in the middle. Imagine a donut; the outer edge is one circle, and the hole is another smaller circle inside.

Example

The playground has an annulus shape, making it perfect for playing ring toss.

Example

The shape of the table is not an annulus; it is a solid square.

Example

Can you draw an annulus with a big circle and a small circle inside?

Context: “anatomy”

(noun) in biology, an annulus can refer to a ring-like structure in some plants or animals. For example, some mushrooms have annulus shapes around their stems.

Example

The mushroom had a beautiful annulus that looked like a tiny collar.

Example

This type of mushroom doesn't have an annulus, so it looks very different.

Example

What does the annulus on the mushroom tell us about its age?

How to pronounce annulus

Pronunciation: [ˈæn.jʊ.ləs]

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