what is the process of accretion
Accretion (astrophysics), the formation of planets and other bodies by collection of material through gravity. Accretion (atmosphere), the process by which water vapor in clouds forms water droplets around nucleation sites.
Science. 1  Accretion (astrophysics), the formation of planets and other bodies by collection of material through gravity. 2  Accretion (atmosphere), the process by which water vapor in clouds forms water droplets around nucleation sites. Accretion (coastal management), the process where coastal sediments return to the visible portion of the beach following storm erosion.