semicircle

[sem-i-sur-kuh l]

noun

Also called sem·i·cir·cum·fer·ence [sem-ee-ser-kuhm-fer-uh ns, -fruh ns, 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.
anything having or arranged in the form of a half of a circle.

Origin of semicircle

From the Latin word sēmicirculus, dating back to 1520–30. See semi-, circle
Related formssem·i·cir·cu·lar [sem-i-sur-kyuh-ler] /ˌsɛm ɪˈsɜr kyə lər/, adjectivesem·i·cir·cu·lar·ly, adverbsem·i·cir·cu·lar·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for semicircular

bowed, concave, convex, curved, crescentic, falcate

Examples from the Web for semicircular

Historical Examples of semicircular


British Dictionary definitions for semicircular

semicircle

noun

  1. one half of a circle
  2. half the circumference of a circle
anything having the shape or form of half a circle
Derived Formssemicircular (ˌsɛmɪˈsɜːkjʊlə), adjectivesemicircularly, 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

Word Origin and History for semicircular
adj.

early 15c., from Latin semicirculus (see semicircle) + -ar.

semicircle

n.

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

Online Etymology Dictionary, © 2010 Douglas Harper