Concretion

Con`cre´tion

n.	1.	The process of concreting; the process of uniting or of becoming united, as particles of matter into a mass; solidification.
	2.	A mass or nodule of solid matter formed by growing together, by congelation, condensation, coagulation, induration, etc.; a clot; a lump; a calculus. Accidental ossifications or deposits of phosphates of lime in certain organs . . . are called osseous concretions. - Dunglison.
	3.	(Geol.) A rounded mass or nodule produced by an aggregation of the material around a center; as, the calcareous concretions common in beds of clay.

Noun	1.	concretion - the formation of stonelike objects within a body organ (e.g., the kidneys)
	2.	concretion - 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" Synonyms: calculus
	3.	concretion - an increase in the density of something Synonyms: compaction, compression, densification
	4.	concretion - the union of diverse things into one body or form or group; the growing together of parts Synonyms: coalescence, coalescency, conglutination, coalition