concretion

[Fr. concrétion; Prov. concrecio; Ital. concrezione, from Latin concretio= a uniting, condensing, or congealing.] [CONCRETE.] I. Ordinary Language: 1. The act of concreting or growing together. "Some plants, upon the top of the sea, are supposed to grow of some concretion of slime from the water, where the sea stirreth little."- Bacon : Natural Hist. 2. The ma thus formed, a clot, a lump. "Heat, in general, doth not resolve and attenuate the juices of a human body; for too great heat will produce concretions." - Arbuthnot: On Aliments. II. Geol .: Either a mechanical aggregation or a chemical union of particles of calcareous or other material producing spherical, oval, or le regularly formed balls in argillaceous or other strata. Such nodules have frequently a shell or other organism constituting the nucleus around which the aggregation or union has taken place. [CONCRETIONARY DEPOSITS.]