a half ellipse, usually one containing both ends of the major axis.
Origin of semiellipse
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for semielliptical
Historical Examples of semielliptical
The carriage when traveling is supported on semielliptical springs, as is also the carriage limber.America's Munitions 1917-1918
shaped like one half of an ellipse, esp one divided along the major axis
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