Xenarchi

plural noun

Xe·​nar·​chi

zəˈnärˌkī

in some classifications

: an order or fishes that comprises only the pirate perches and is usually included in the order Salmopercae

Word History

Etymology

New Latin, from xen- + Greek archos rectum, anus; akin to Greek archein to begin

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