Accretion may refer to:
Science
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Accretion (astrophysics)
In astrophysics, accretion is the accumulation of particles into a massive object by gravitationally attracting more matter, typically gaseous matter, in an accretion disk. Most astronomical objects, such as galaxies, stars, and planets, are ...
, the formation of planets and other bodies by collection of material through gravity
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Accretion (meteorology) Accretion is defined as the gradual collection of something over time. In meteorology or atmospheric science it is the process of accumulation of frozen water as precipitation over time as it descends through the atmosphere, in particular when an ...
, the process by which water vapor in clouds forms water droplets around nucleation sites
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Accretion (coastal management)
Accretion is the process of coastal sediment returning to the visible portion of a beach or foreshore after a submersion event. A sustainable beach or foreshore often goes through a cycle of submersion during rough weather and later accretion d ...
, the process where coastal sediments return to the visible portion of the beach following storm erosion
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Accretion (geology)
Accretion, in geology, is a process by which material is added to a tectonic plate at a Subduction, subduction zone, frequently on the edge of existing continental Landmass, landmasses. The added material may be sediment, Volcanic arc, volcanic ...
, the increase in size of a tectonic plate by addition of material along a convergent boundary
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Accretionary wedge
An accretionary wedge or accretionary prism forms from sediments accreted onto the non- subducting tectonic plate at a convergent plate boundary. Most of the material in the accretionary wedge consists of marine sediments scraped off from the d ...
Other uses
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Accretion (finance)
In finance, the term accretion refers to a positive change in value following a transaction; it is applied in several contexts.
When trading in bonds, accretion is the capital gain expected when a bond is bought at a discount to its par value ...
, predictable changes in the price of certain securities
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