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