- The process of concreting; the process of uniting or of
becoming united, as particles of matter into a mass; solidification. - A mass or nodule of solid matter formed by growing
together, by congelation, condensation, coagulation, induration, etc.;
a clot; a lump; a calculus. - A rounded mass or nodule produced by an aggregation of
the material around a center; as, the calcareous concretions common in
beds of clay.
Meaning of 'concretion' (Princeton's WordNet)
1 . concretion
[ n]
Meaning (1): - a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body