'Concretion' definitions:

Definition of 'concretion'

(from WordNet)
noun
The formation of stonelike objects within a body organ (e.g., the kidneys)
noun
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]
noun
An increase in the density of something [syn: compaction, compression, concretion, densification]
noun
The union of diverse things into one body or form or group; the growing together of parts [syn: coalescence, coalescency, coalition, concretion, conglutination]

Definition of 'Concretion'

From: GCIDE
  • Concretion \Con*cre"tion\, n. [L. concretio.]
  • 1. The process of concreting; the process of uniting or of becoming united, as particles of matter into a mass; solidification. [1913 Webster]
  • 2. A mass or nodule of solid matter formed by growing together, by congelation, condensation, coagulation, induration, etc.; a clot; a lump; a calculus. [1913 Webster]
  • Accidental ossifications or deposits of phosphates of lime in certain organs . . . are called osseous concretions. --Dunglison. [1913 Webster]
  • 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. [1913 Webster]