semiellipse

[ sem-ee-i-lips, sem-ahy- ]

noun

, Geometry.

1. a half ellipse, usually one containing both ends of the major axis.

Other Words From

• sem·i·el·lip·tic [sem-ee-i-, lip, -tik, sem-ahy-], semi·el·lipti·cal adjective

Word History and Origins

Origin of semiellipse¹

First recorded in 1725–35; semi- + ellipse