Accretion

n. expansion or increase due to gradual build-up or additions; growth, increase in size; added part, addition; growing together or joining of separate parts

Accretion may refer to:Accretion (finance), predictable changes in the price of certain securities
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Noun
1. an increase by natural growth or addition
(synonym) accumulation
(hypernym) increase, increment, growth
(hyponym) backup
(derivation) accrete
2. something contributing to growth or increase; "he scraped away the accretions of paint"; "the central city surrounded by recent accretions"
(hypernym) addition, increase, gain
3. (astronomy) the formation of a celestial object by the effect of gravity pulling together surrounding objects and gases
(hypernym) increase, increment, growth
(classification) astronomy, uranology
4. (biology) growth by addition as by the adhesion of parts or particles
(hypernym) increase, increment, growth
(derivation) accrete
(classification) biology, biological science
5. (geology) an increase in land resulting from alluvial deposits or water-borne sediment
(hypernym) increase, increment, growth
(classification) geology
6. (law) an increase in a beneficiary's share in an estate (as when a co-beneficiary dies or fails to meet some condition or rejects the inheritance)
(hypernym) inheritance, heritage
(classification) law, jurisprudence

(n.)
The adhering of property to something else, by which the owner of one thing becomes possessed of a right to another; generally, gain of land by the washing up of sand or sail from the sea or a river, or by a gradual recession of the water from the usual watermark.
  

(n.)
The act of increasing, or the matter added, by an accession of parts externally; an extraneous addition; as, an accretion of earth.
  

(n.)
The act of increasing by natural growth; esp. the increase of organic bodies by the internal accession of parts; organic growth.
  

(n.)
Gain to an heir or legatee, failure of a coheir to the same succession, or a co-legatee of the same thing, to take his share.
  

(n.)
Concretion; coherence of separate particles; as, the accretion of particles so as to form a solid mass.
  

(n.)
A growing together of parts naturally separate, as of the fingers toes.
  

noun
growth of a substance which sticks to an object; an accretion of calcium round the joint