n.
1.the formation of stonelike objects within a body organ (e.g., the kidneys)
2.a hard lump produced by the concretion of mineral salts
3.an increase in the density of something
4.the union of diverse things into one body or form or group
Idiom of the Day
hold the reins
to be the most influential person
The manager has been holding the reins in his company for many years.