Accretion

нара́щивание

naráščivanije

((gradual) increase by an external addition of matter; an instance of this)

сраста́ние

srastánije

(process of separate particles aggregating or coalescing together; thing formed in this manner — see also concretion)

сраще́ние

sraščénije

(process of separate particles aggregating or coalescing together; thing formed in this manner — see also concretion)