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semicircle

[sem-i-sur-kuh l] /ˈsɛm ɪˌsɜr kəl/
noun
1.
Also called semicircumference
[sem-ee-ser-kuhm-fer-uh ns, -fruh ns, sem-ahy-] /ˌsɛm i sərˈkʌm fər əns, -frəns, ˌsɛm aɪ-/ (Show IPA)
. 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
1520-1530
1520-30; < Latin sēmicirculus. See semi-, circle
Related forms
semicircular
[sem-i-sur-kyuh-ler] /ˌsɛm ɪˈsɜr kyə lər/ (Show IPA),
adjective
semicircularly, adverb
semicircularness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for semi circular

semicircle

/ˈsɛmɪˌsɜːkəl/
noun
1.
  1. one half of a circle
  2. half the circumference of a circle
2.
anything having the shape or form of half a circle
Derived Forms
semicircular (ˌsɛmɪˈsɜːkjʊlə) adjective
semicircularly, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for semi circular

semicircle

n.

1520s, from semi- + circle (n.) or else from Latin semicirculus.

Online Etymology Dictionary, © 2010 Douglas Harper
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6
7
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