[kon-kree-shuhn, kong-]
the act or process of concreting or becoming substantial; coalescence; solidification.
the state of being concreted.
a solid mass formed by or as if by coalescence or cohesion: a concretion of melted candies.
anything that is made real, tangible, or particular.
Pathology. a solid or calcified mass in the body formed by a disease process.
Geology. a rounded mass of mineral matter occurring in sandstone, clay, etc., often in concentric layers about a nucleus.

1535–45; < Latin concrētiōn- (stem of concrētiō). See concrete, -ion Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
concretion (kənˈkriːʃən)
1.  the act or process of coming or growing together; coalescence
2.  a solid or solidified mass
3.  something made real, tangible, or specific
4.  any of various rounded or irregular mineral masses formed by chemical precipitation around a nucleus, such as a bone or shell, that is different in composition from the sedimentary rock that surrounds it
5.  pathol another word for calculus

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

concretion con·cre·tion (kən-krē'shən)
A solid mass, usually composed of inorganic material, formed in a cavity or tissue of the body; a calculus.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
These drawings shall be modified to indicate actual dimensions, cable runs, and concretion specifics.
The process, known as concretion, is the result of complex microbial and electrochemical reactions.
Areas of concretion covering portions of the hull and hull plating had to be cleared away.
This concretion is said to be a tonic for the respiratory diseases.
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