semicircle

noun

semi·​cir·​cle ˈse-mē-ˌsər-kəl How to pronounce semicircle (audio)
ˈse-ˌmī-,
-mi-
1
: a half of a circle
2
: an object or arrangement of objects in the form of a half circle
semicircular
ˌse-mē-ˈsər-kyə-lər How to pronounce semicircle (audio)
ˌse-ˌmī-
-mi-
adjective

Examples of semicircle in a Sentence

The children sat in a semicircle. The houses are built in a semicircle.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Tropical-storm-force winds extend outward up to 205 miles from the center, primarily in the eastern semicircle of the storm. Doyle Rice, USA Today, 17 Sep. 2025 Many wineries build a semicircle of rocks around the hoyos, each with its own style, to protect the vines from the Atlantic Ocean trade winds. Lauren David, Travel + Leisure, 16 Sep. 2025 The two remaining vehicles in the study – the Jeep Grand Cherokee and Ford F-150 – fell between these extremes, both for the available near-view in 2023 (50% and 36% of the semicircle, respectively) and the proportional reduction over time (25% and 21% – the F150 was very restricted even in 2001). Ian Baker august 21, New Atlas, 21 Aug. 2025 Upstairs, both of these semicircles are capped with private balconies: One extends off the home’s original primary suite, the other off the larger guest room. Adriane Quinlan, Curbed, 17 July 2025 See All Example Sentences for semicircle

Word History

Etymology

Latin semicirculus, from semi- + circulus circle

First Known Use

1526, in the meaning defined at sense 1

Time Traveler
The first known use of semicircle was in 1526

Browse Nearby Words

Cite this Entry

“Semicircle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/semicircle. Accessed 18 Sep. 2025.

Kids Definition

semicircle

noun
semi·​cir·​cle ˈsem-i-ˌsər-kəl How to pronounce semicircle (audio)
1
: half of a circle
2
: an object or arrangement of objects in the form of a half circle
semicircular adjective

More from Merriam-Webster on semicircle

Last Updated: - Updated example sentences
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