semiarch

noun

semi·​arch

"+

: an arch having only one springer and terminating at its highest point : half arch

Word History

Etymology

semi- + arch

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now