Gyroceras

noun

Gy·​roc·​er·​as

-əs

: a genus of fossil nautiloid cephalopods having the shell in the form of a loosely coiled discoidal spiral

Word History

Etymology

New Latin, from gyr- + -ceras

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