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The act of adding portions of soil to the soil already in possession of the owner by gradual deposition through the operation of natural causes.

The growth of the value of a particular item given to a person as a specific bequest under the provisions of a will between the time the will was written and the time of death of the testator—the person who wrote the will.

Accretion of land is of two types: (1) by alluvion, the washing up of sand or soil so as to form firm ground; and (2) by dereliction, as when the sea shrinks below the usual watermark. The terms alluvion and accretion are often used interchangeably, but alluvion refers to the deposit itself while accretion denotes the act. Land uncovered by a gradual subsidence of water is not an accretion; it is a reliction.

West's Encyclopedia of American Law, edition 2. Copyright 2008 The Gale Group, Inc. All rights reserved.


1 the natural increase in the area of land by accumulation of soil and the like. In Scotland the Roman term ALLUVIO is used for the same concept.
2 in Scotland, the term used in conveyancing to denote the fortification of a title by subsequent acquisition of ownership.
Collins Dictionary of Law © W.J. Stewart, 2006

ACCRETION. The increase of land by the washing of the seas or rivers. Hale, De Jure Maris, 14. Vide Alluvion; Avulsion.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
"We are also probing accretion onto the black hole.
A: Accretion is the gradual and imperceptible deposit made through the effects of the current of the water.
Since the initial ice accretion angle existed in the actual icing conductor, the initial ice accretion angles of 0[degrees], -10[degrees], and +10[degrees] are discussed in this experiment, which are shown in Figure 2(b).
A good example of accretion and its application to our industry is a recent case that came out of Region 19 (Washington, Oregon, Alaska, northern Idaho and eastern Montana) of the National Labor Relations Board (NLRB): CPM Development Corp.
A spinning black hole like that in Interstellar would create a radiant and glowing accretion disc, simply due to the heat and speed of movement.
By studying the jets from pre-planetary and planetary nebulae, Blackman and Lucchini were able to connect the energy and momentum involved in the accretion process with that in the jets; the process of accretion is what in effect provides the fuel for these jets.
Since the material carries substantial angular momentum, it does not settle on the primary immediately, but forms an accretion disc around the white dwarf.
The country's first dedicated corps for offensive mountain warfare, which is part of the overall force accretion plan, will be based at Panagarh in West Bengal.
MARYLAND (CyHAN)- This animation of supercomputer data takes you to the inner zone of the accretion disk of a stellar-mass black hole.
Aetna continues to project that the transaction will be modestly accretive to 2013 operating earnings per share, with USD0.45 of accretion in 2014 and USD0.90 of accretion in 2015.
"During April-December 2012, there was an accretion to foreign exchange reserves by USD 1.1 billion as compared to a draw-down of reserves worth USD 7.1 billion in the corresponding period of preceding year," the report said.
Sixty-nine papers from the October 2011 conference present research on the physical characteristics of active galactic nuclei (AGN) accretion disk winds.