- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for semicircular
It terminates to the north in an arch and a semicircular apse in brick.Byzantine Churches in Constantinople
Alexander Van Millingen
The door has eight panels besides the semicircular one at the top.
It was widest at the upper part, where it was semicircular, while the bottom was cut off straight.The Cat of Bubastes
G. A. Henty
The roofs are throughout of dark panelled wood and semicircular in shape.Portuguese Architecture
Walter Crum Watson
Naturally it prepares an entrance; the form of this is semicircular.The Industries of Animals
- one half of a circle
- half the circumference of a circle
- anything having the shape or form of half a circle
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
Online Etymology Dictionary, © 2010 Douglas Harper