Английский разговорный словарь (основной) - concretion
Concretion
concretion
kənˈkri:ʃən n. 1 a a hardsolid concreted mass. b the forming of this by coalescence. 2 Med. a stony mass formed within the body. 3 Geol. a smallround mass of rock particles embedded in limestone or clay. øøconcretionary adj. [F f. L concretio (as concrete)]