annule

noun

an·​nule

ˈa(ˌ)nyül

plural -s

: annulus

specifically : a circular band formed by two transverse grooves in the cuticle of some nematodes with consequent apparent segmentation

Word History

Etymology

Latin annulus

First Known Use

circa 1681, in the meaning defined above

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