Look up accretion in Wiktionary, the free dictionary.

Accretion may refer to:

• Accretion (finance), predictable changes in the price of certain securities

[edit] Accretion in science

In science, accretion is a process in which the size of something gradually increases by steady addition of smaller parts. This term is used with specific meanings in several scientific fields:

• Accretion (astrophysics)
• Accretion (atmosphere) in meteorology, is the process by which water vapor in clouds forms water droplets around nucleation sites.
• Accretion (geology) is an increase in size of a tectonic plate by addition of material along a convergent boundary.
• Accretion (hydrography) is the enlargement of a watercourse by the inflow of groundwater and tributary surface water.
• Accretion (coastal management) is the process where coastal sediments return to the visible portion of the beach following storm erosion.

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