fusulina

noun

fu·​su·​li·​na

ˌfyüzəˈlīnə,

-lēnə

1

capitalized : a genus (the type of the family Fusulinidae) of large fossil spindle-shaped foraminiferans having a test with 4-layered walls and deeply folded septa and serving as an index fossil in various Lower and Middle Pennsylvanian rocks

2

plural -s : an animal or fossil of Fusulina or a related genus

Word History

Etymology

New Latin, from Latin fusus spindle + -ulus (diminutive suffix) + New Latin -ina

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