trizonal

adjective

tri·​zonal

(ˈ)trī+

sometimes capitalized

: of, relating to, or concerned with the combined affairs of three administrative areas

Word History

Etymology

tri- + zonal

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