spina externa

noun

spina ex·​ter·​na

-ˌekˈstərnə

plural spinae externae

-rˌnē

: a median bony point projecting from the anterior and ventral margin of the sternum of a bird

Word History

Etymology

New Latin, external spine

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