accretion
(ă-kree-shŏn) the accumulation of deposits in an organ or cavity. Calculi may be formed by accretion.
accretion n. Quick reference
A Dictionary of Nursing (8 ed.)
... [ă- kree -shŏn] n. the accumulation of deposits in an organ or cavity. Calculi may be formed by accretion...
accretion Quick reference
A Dictionary of Dentistry (2 ed.)
...accretion n. An accumulation of material such as calculus , plaque , or dental cement on tooth...
accretion Quick reference
A Dictionary of Astronomy (3 ed.)
... The process by which the mass of a body increases by the accumulation of matter, in the form of either gas or small solid bodies which collide with and adhere to the body. The bodies in the Solar System are thought to have grown by accretion; some stars are surrounded by an accretion disk...
accretion Quick reference
A Dictionary of Geography (6 ed.)
... 1. The growth of land by the offshore deposition of sediment, forming spits and tombolos . Accretion is most active in estuaries , particularly within the tropics. Vertical accretion in estuarine marshes depends on rates of sediment deposition and is a complex function of different interacting variables. See Butzeck et al. (2015) Estuaries and Coasts 38, 434–50. 2. The increase in size of a continent by the addition of accretion terranes . 3. The growth of a landform by the addition of deposits; seif dunes grow by accretion. See H. S....
accretion Quick reference
A Dictionary of Geology and Earth Sciences (5 ed.)
... 1. Process by which an inorganic body grows in size by the addition of new particles to its exterior. It is the mechanism by which primitive planetary bodies are believed to form as a result of the accumulation of minute, cold, homogeneous particles (homogeneous accretion). An alternative hypothesis is that iron-rich cores accumulated first and were later surrounded by silicate material (heterogeneous accretion). Homogeneous accretion yields a planet that initially has the same composition from centre to surface; heterogeneous accretion yields a planet...
accretion Reference library
Australian Law Dictionary (3 ed.)
...accretion Gradual and imperceptible increase or accumulation over time, as in the increased worth of assets that are periodically revalued (an accretion to capital), as in the accumulation of capital in a trust, or as in the enlargement of a parcel of land over time due to natural occurrences such as the build-up of sediment from a lake or river, or a receding water line ( cf avulsion ). The doctrine of accretion provides that the boundary moves in accordance with the mean high-water mark. From Latin accrescere , to grow, accretionem , a growing...
accretion Quick reference
A Dictionary of Accounting (5 ed.)
... An increase in the value of an asset as a result of a physical change (e.g. a growing crop), as opposed to an increase in value as a result of a change in its market...
accretion Quick reference
A Dictionary of Law (10 ed.)
...claim title to the new land so created. See also thalweg, rule of the . For cases in which acquisition of territory by accretion has arisen, see The Anna ( 1805 ) 5 C Rob 373 ( Lord Stowell ) and Secretary of State for India v Chellikani Rama Roa ( 1916 ) 32 TLR 652 (PC). There is a large volume of US decisions concerning accretion; the classic illustration of a finding of both accretion and avulsion can be found in the Chamizal Arbitration 5 AJIL 785 ( 1911 ) concerning the path of the Rio...
accretion Quick reference
A Dictionary of Ecology (5 ed.)
... 1 The process by which an inorganic body grows in size by the addition of new particles to its exterior. 2 The accumulation of sediments from any cause, representing an excess of deposition over erosion . 3 The addition of material to the edge of a continent, thus enlarging...
accretion Quick reference
A Dictionary of Weather (3 ed.)
... 1 A term used in cloud physics for the growth of a frozen precipitation particle through the collision of an ice crystal or snowflake with supercooled water droplets, which freeze instantly on contact. Compare coalescence . 2 In a more general sense, the coalescence or agglomeration of either liquid or frozen...
accretion Reference library
Encyclopaedic Dictionary of International Law (3 ed.)
... In international law, this is a generic term for methods by which a State may acquire title to territory through the gradual operations of nature and requiring no formal acts of appropriation, e.g., alluvial deposits at the mouths of rivers, significant changes in the course of rivers: The Anna 5 C. Rob. 373 (1805) ; Island of Palmas Case (1928) 2 R.I.A.A. 829 at 839. If a river is a boundary between States, accretion will alter the boundary with the erosion and deposit of soil: Louisiana v. Mississippi 282 U.S. 458 (1931) . See I Oppenheim 696 ....
accretion Quick reference
A Dictionary of Environment and Conservation (3 ed.)
... A process of growth by accumulation and adhesion. Examples include the build‐up or accumulation of sediment , and the process by which precipitation particles grow, by the collision of an ice crystal or snowflake with a supercooled liquid droplet that freezes upon impact. On a large scale, the term is also used to describe primitive planetary growth, and to describe the addition of material at the edges of pre‐existing...
accretion Reference library
The Handbook of International Financial Terms
... . 1 The writing to profit of the increase in the value of an asset over a period of time. For securities, it tends to indicate an increase in the principal amount over time in a predictable or determined manner ( cf. amortization ). Hence bonds which are trading at a discount to par accrete to their principal value as they move towards maturity . 2 In portfolio analysis , the resultant increase in value of bonds which are at a discount as they move to par at maturity; bonds at a premium are amortized to...
accretion lines Quick reference
A Dictionary of Dentistry (2 ed.)
...accretion lines n. Lines visible in microscopic sections of enamel marking successive layers of added...
accretion disk Quick reference
A Dictionary of Physics (8 ed.)
...accretion disk A disk-shaped rotating mass formed by gravitational attraction. See black hole ; neutron star ; white dwarf ....
heterogeneous accretion Quick reference
A Dictionary of Geology and Earth Sciences (5 ed.)
...accretion A model for the accretion of the planetary bodies from the primitive solar nebula ( PSN ), in which the rate of accretion of solid particles into the planets is slow relative to the rate at which the PSN cools. The consequence is that the surface layer of each body at any one time is in equilibrium with the pressure and temperature conditions prevailing in the nebula, and thus each planet accretes successive ‘onion-skin’ layers of material with different compositions. According to this model, the layered structure of planets may be...
homogeneous accretion Quick reference
A Dictionary of Geology and Earth Sciences (5 ed.)
...accretion A model for the accretion of planetary bodies from the primitive solar nebula ( PSN ) in which the rate of accretion is fast relative to the rate at which the PSN cools. The consequence is that each body forms very quickly and consists entirely of material that was in equilibrium with the physical conditions of the PSN over only a very short period of time. According to this model, the layered structures of the planets are entirely of secondary origin. Compare heterogeneous accretion...
accretion disc Quick reference
A Dictionary of Space Exploration (3 ed.)
...accretion disc A flattened ring of gas and dust orbiting an object in space, such as a star or black hole . The orbiting material is accreted (gathered in) from a neighbouring object such as another star. Giant accretion discs are thought to exist at the centres of some galaxies and quasars . If the central object of the accretion disc has a strong gravitational field, as with a neutron star or a black hole, gas falling onto the accretion disc releases energy, which heats the gas to extreme temperatures and emits short-wavelength radiation, notably...
lateral accretion Quick reference
A Dictionary of Environment and Conservation (3 ed.)
...accretion Deposition by a river on the inside corner of meander bends, which creates point bars and helps to build the floodplain...
lateral accretion Quick reference
A Dictionary of Geography (6 ed.)
...accretion The build-up of sediments, as in a recurved spit ( Kumar and Sanders (1974) Sedimentol. 21, 4 ), or a meander ( Brooks (2003) Geomorph. 54, 3–4...
