This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The act or process of concreting into a mass; coalescence.

n. The state of having been concreted: a concretion of seminal ideas in her treatise.

n. A solid hard mass.

n. Geology A rounded mass of mineral matter found in sedimentary rock.

n. Pathology A solid mass, usually composed of inorganic material, formed in a cavity or tissue of the body; a calculus.

n. The process of aggregating or coalescing into a mass.

n. A solid, hard mass formed by a process of aggregation or coalescence.

n. A rounded mass of a mineral, sometimes found in sedimentary rock or on the ocean floor.

n. The action of making something concrete or the result of such an action.

n. The process of concreting; the process of uniting or of becoming united, as particles of matter into a mass; solidification.

n. A mass or nodule of solid matter formed by growing together, by congelation, condensation, coagulation, induration, etc.; a clot; a lump; a calculus.

n. A rounded mass or nodule produced by an aggregation of the material around a center.

n. The act of growing together or becoming united in one mass; concrescence; coalescence.

n. A mass of solid matter formed by a growing together, or by congelation, condensation, coagulation, conglomeration, or induration; a clot; a lump; a nodule: as, “concretions of slime,”

n. Specifically In geology, an aggregation of mineral matter, usually calcareous or silicious, in concentric layers, so arranged as to give rise to a form approaching the spherical, but often much flattened.

n. In logic: The state of being concrete; concreteness.

n. The act of determination, or of rendering a concept more concrete or determinate by adding to the marks it contains.

n. In old chem., reduction of a liquid to a solid, commonly by partial evaporation.

n. an increase in the density of something

n. the formation of stonelike objects within a body organ (e.g., the kidneys)

n. the union of diverse things into one body or form or group; the growing together of parts

n. a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body

"Most likely the structure is a sandy "concretion" that formed after the critter died, says the study."

concentration    natural process    action    activity    natural action    uniting    conjugation    union    unification    jointure   

solidification    accretion    morbid concretions    gouty concretions   

concrete   

solidification    clot    lump    calculus   

cementation    fluidity    solidification    calcedony    liquefaction    congelation    incrustation    sparry    dioxane    divagation