Trefoil

Trefoil is a special type of shape that looks like a three-leafed plant. You might have seen it before on a crest or logo or on St. Patrick's Day. It's made up of three curved lines that all start at the same place and end up in three different places.

Imagine you're drawing a picture of a flower. If you draw three leaves that all start at the same spot and curve around to different spots on your paper, you've made a trefoil!

The word "trefoil" actually comes from two other words: "tri," which means three, and "foil," which is an old word for leaf. So trefoil means "three leaves."

Trefoils are often used in art and design because they look really cool, and they're also a symbol of good luck or unity. So next time you spot a trefoil, you'll know what it means!