n. 凝固, 凝固物, 结石

[医] 凝结物, 结石; 粘连; 凝结(作用)

Concretion \Con*cre"tion\, n. [L. concretio.]
1. The process of concreting; the process of uniting or of
becoming united, as particles of matter into a mass;
solidification.

2. A mass or nodule of solid matter formed by growing
together, by congelation, condensation, coagulation,
induration, etc.; a clot; a lump; a calculus.

Accidental ossifications or deposits of phosphates
of lime in certain organs . . . are called osseous
concretions. --Dunglison.

3. (Geol.) A rounded mass or nodule produced by an
aggregation of the material around a center; as, the
calcareous concretions common in beds of clay.