semiellipse

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

noun Geometry.

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

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Origin of semiellipse

First recorded in 1725–35; semi- + ellipse

OTHER WORDS FROM semiellipse

sem·i·el·lip·tic [sem-ee-i-lip-tik, sem-ahy-], /ˌsɛm i ɪˈlɪp tɪk, ˌsɛm aɪ-/, sem·i·el·lip·ti·cal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020