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semiarch

American  
[sem-ee-ahrch, sem-ahy-] / ˈsɛm iˌɑrtʃ, ˈsɛm aɪ- /

noun

  1. a half arch.

Etymology

Origin of semiarch

First recorded in 1815–25; semi- + arch 1

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.