Noun

• S: (n) concretion (the formation of stonelike objects within a body organ (e.g., the kidneys))
• S: (n) calculus, concretion (a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body) "renal calculi can be very painful"
• S: (n) compaction, compression, concretion, densification (an increase in the density of something)
• S: (n) coalescence, coalescency, coalition, concretion, conglutination (the union of diverse things into one body or form or group; the growing together of parts)