concretion

UK: /kənˈkriːʃən/ US: (kon krē′shən, kong-)

WordReference Random House Unabridged Dictionary of American English © 2026

con•cre•tion  (kon krē′shən, kong-), n. 

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

• Latin concrētiōn- (stem of concrētiō). See concrete, -ion
• 1535–45

Collins Concise English Dictionary © HarperCollins Publishers::

concretion / kənˈkriːʃən/ noun

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. another word for calculus

conˈcretionary adjective