semicircle
semicircle — noun
- semicirclesingular
- semicirclesplural
1. a flat shape made by cutting a circle in half along its diameter
a flat shape made by cutting a circle in half along its diameter
Andrés drew a large semicircle on the board with a piece of chalk.
drew + semicircle + on + surface
Adina opened her geometry book and measured the area of the semicircle on page twelve.
measure the area of a semicircle
After the downpour, a rainbow curved in a bright semicircle over the wet playground.
Bilal cut a semicircle out of blue paper and stuck it on the card.
The stone arch above the old wooden door was a perfect semicircle.
- half-circle
same meaning; more common in everyday speech, often hyphenated
- hemicycle
formal term used mainly in architecture and design
2. people or objects placed so that they follow the curved outline of a half-circle
people or objects placed so that they follow the curved outline of a half-circle
The children sat in a semicircle on the floor to hear the story.
sit in a semicircle
Olivia placed the chairs in a semicircle around the small round table.
place + objects + in a semicircle
A semicircle of market stalls lined the square on festival morning.
The students formed a semicircle in front of the board for the class photo.
Kasia arranged the candles in a semicircle on the birthday cake.
用法筆記
Subject is usually a group of people or a collection of objects, not a single item.