Concretion - Definition

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;
found in hollow organs or ducts of the body; "renal calculi
can be very painful" [syn: calculus, concretion]
3: an increase in the density of something [syn: compaction,
compression, concretion, densification]
4: the union of diverse things into one body or form or group;
the growing together of parts [syn: coalescence,
coalescency, coalition, concretion, conglutination]