[ sem-ee-i-lips, sem-ahy- ]
/ ˌsɛm i ɪˈlɪps, ˌsɛm aɪ- /
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