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semicircle

 - 3 dictionary results

sem⋅i⋅cir⋅cle

  [sem-i-sur-kuhl]
Use semicircle in a Sentence
–noun
1. Also called sem⋅i⋅cir⋅cum⋅fer⋅ence  [sem-ee-ser-kuhm-fer-uhns, -fruhns, sem-ahy-] . half of a circle; the arc from one end of a diameter to the other.
2. anything having or arranged in the form of a half of a circle.
Origin:
1520–30; < L sēmicirculus. See semi-, circle

Related forms:
sem⋅i⋅cir⋅cu⋅lar  [sem-i-sur-kyuh-ler] , adjective
sem⋅i⋅cir⋅cu⋅lar⋅ly, adverb
sem⋅i⋅cir⋅cu⋅lar⋅ness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To semicircle
sem·i·cir·cle   (sěm'ĭ-sûr'kəl)   
n.  

  1. A half of a circle as divided by a diameter.

  2. An object or arrangement of objects or people in the shape of half a circle.

sem'i·cir'cu·lar (-kyə-lər) adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

semicircle 
1526, from semi- + circle. Semicircular is attested from 1432.
Online Etymology Dictionary, © 2001 Douglas Harper
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