accretion
Pronunciation:
/ə.ˈkɹi.ʃən/noun
Definitions
The act of increasing by natural growth; especially the increase of organic bodies by the internal accession of parts; organic growth.
The act of increasing, or the matter added, by an accession of parts externally; an extraneous addition
Example: A mineral ... augments not by growth, but by accretion.
Something added externally to promote growth the external growth of an item.
Concretion; coherence of separate particles
Example: the accretion of particles so as to form a solid mass