semicircle

[ sem-i-sur-kuhl ]
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noun
  1. Also called sem·i·cir·cum·fer·ence [sem-ee-ser-kuhm-fer-uhns, -fruhns, sem-ahy-]. /ˌsɛm i sərˈkʌm fər əns, -frəns, ˌsɛm aɪ-/. 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 of semicircle

1
From the Latin word sēmicirculus, dating back to 1520–30. See semi-, circle

Other words from semicircle

  • sem·i·cir·cu·lar [sem-i-sur-kyuh-ler], /ˌsɛm ɪˈsɜr kyə lər/, adjective
  • sem·i·cir·cu·lar·ly, adverb
  • sem·i·cir·cu·lar·ness, noun

Words Nearby semicircle

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use semicircle in a sentence

British Dictionary definitions for semicircle

semicircle

/ (ˈsɛmɪˌsɜːkəl) /


noun
    • one half of a circle

    • half the circumference of a circle

  1. anything having the shape or form of half a circle

Derived forms of semicircle

  • 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