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.
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.