rognon

noun

ro·​gnon

(ˈ)rōn¦yōⁿ,

(ˈ)rȯn-

plural -s

: a small rounded mass of rock usually embedded in rock of a different type

Word History

Etymology

French, literally, kidney, from (assumed) Vulgar Latin renion-, renio, from Latin renes (plural) kidneys

First Known Use

1853, 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