emissarium

noun

em·​is·​sar·​i·​um

ˌeməˈsa(a)rēəm

plural emissaria

-ēə

: a subterranean channel used by the ancient Romans for the drainage of a lake lacking a natural outlet

Word History

Etymology

Latin, from emissus (past participle of emittere to send out) + -arium

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