Atrypa

noun

Atry·​pa

ə‧ˈtrīpə

: a genus of extinct Silurian and Devonian plicate-shelled or costate-shelled brachiopods having the plates of the brachidium produced into spirally rolled processes with the apices usually directed toward the plane of symmetry of the valve

Word History

Etymology

New Latin, from a- entry 2 + Greek trypa hole

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