concretion


concretion (http://definr.com/concretion)

     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 [syn: calculus,
         stone]
     3: an increase in the density of something [syn: compaction,
        compression, densification]
     4: the union of diverse things into one body or form or group;
        the growing together of parts [syn: coalescence, coalescency,
         coalition, conglutination]