pneumostome

noun

pneu·​mo·​stome

ˈn(y)üməˌstōm

plural -s

: the respiratory opening of a gastropod mollusk

Word History

Etymology

International Scientific Vocabulary pneum- + -stome

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