melon shell

noun

: any of several very large ovoid and often lustrous and richly colored gastropod mollusks constituting the genus Cymbium and being widely distributed in the southwestern Pacific ocean

called also bailer shell, boat shell

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