accretion

Accretion may refer to:

Science

Accretion (astrophysics), the formation of planets and other bodies by collection of material through gravity
Accretion (meteorology), 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
Accretion (geology), the increase in size of a tectonic plate by addition of material along a convergent boundary