1. The union of diverse things into one body, form or group; the growing together of parts
   "The concretion of small droplets formed larger water beads on the surface";
   - coalescence, coalescency, coalition, conglutination, concrescence
    
2. An increase in the density of something
   "The concretion of the urban area led to traffic congestion";
   - compaction, compression, densification
    
3. The formation of stonelike objects within a body organ (e.g., the kidneys)
   "Kidney stones are a common type of concretion"
    
4. A hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body
   "renal concretions can be very painful";
   - calculus

Derived forms: concretions

Type of: action, activity, concentration, conjugation, jointure [archaic], natural action, natural process, rock, stone, unification, union

Encyclopedia: Concretion