concretion

Concretion has 3 syllables: con · cre · tion.

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

noun. An increase in the density of something.

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

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