con·cre·tion (k n-kr  shn)n. 1. a. The act or process of concreting into a mass; coalescence. b. The state of having been concreted: a concretion of seminal ideas in her treatise. 2. A solid hard mass. 3. Geology A rounded mass of mineral matter found in sedimentary rock. 4. Pathology A solid mass, usually composed of inorganic material, formed in a cavity or tissue of the body; a calculus. con·cre tion·ar y (-sh-n r) adj. |
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