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The Collaborative International Dictionary

Aggregation \Ag`gre*ga"tion\, n. [Cf. LL. aggregatio, F. agr['e]gation.] The act of aggregating, or the state of being aggregated; collection into a mass or sum; a collection of particulars; an aggregate.

Each genus is made up by aggregation of species.

A nation is not an idea only of local extent and individual momentary aggregation, but . . . of continuity, which extends in time as well as in numbers, and in space.

Douglas Harper's Etymology Dictionary

early 15c., from Middle French agrégation or directly from Medieval Latin aggregationem (nominative aggregatio), noun of action from past participle stem of Latin aggregare (see aggregate (adj.)).


n. 1 The act of collecting together (aggregating). 2 The state of being collected into a mass, assemblage, or sum (aggregated). 3 A collection of particulars; an aggregate. 4 (context networking English) summarizing multiple routes into one route. 5 (context epidemiology English) the majority of the parasite population concentrated into a minority of the host population.

  1. n. several things grouped together or considered as a whole [syn: collection, accumulation, assemblage]

  2. the act of gathering something together [syn: collection, collecting, assembling]


Aggregation may refer to uses in:

  • Business and economics:
    • Aggregation problem (economics)
    • Purchasing aggregation, the joining of multiple purchasers in a group purchasing organization to increase their buying power
    • Community Choice Aggregation, the joining of geographically contiguous communities to bypass a conventional energy utility monopoly and seek a greener energy service
  • Computer science and telecommunication:
    • Aggregate function, a type of function in data processing
    • Data aggregation
    • Aggregation, a form of object composition in object-oriented programming
    • Link aggregation, using multiple Ethernet network cables/ports in parallel to increase link speed
    • Packet aggregation, joining multiple data packets for transmission as a single unit to increase network efficiency
    • Route aggregation, the process of forming a supernet in computer networking
    • Aggregation, a process by which Australian country television markets were combined in the late 1980s and 1990s; see Regional television in Australia
  • Natural sciences and statistics:
    • Aggregation of soil granules to form soil structure
    • Particle aggregation, direct mutual attraction between particles (atoms or molecules) via van der Waals forces or chemical bonding
    • The accumulation of platelets to the site of a wound to form a platelet plug or a thrombus
    • Flocculation, a process where a solute comes out of solution in the form of floc or flakes
    • Overdispersion or statistical aggregation, where the variance of a distribution is higher than expected
    • Aggregation pheromone
    • Protein aggregation, the aggregation of mis-folded proteins
Aggregation (linguistics)

Aggregation is a subtask of natural language generation, which involves merging syntactic constituents (such as sentences and phrases) together. Sometimes aggregation can be done at a conceptual level.

Aggregation (magazine)

Aggregation was a Canadian online magazine published between 2010 to 2012. Each issue collected together stories and trends from five contributors based on hyperlinks they'd discover on the web. It was one of the first Canadian publications designed exclusively for Apple's iPad.

Aggregation was conceived and published by Gary Campbell. It was released online, for free, on the 15th of the month for six consecutive months, from November 2010 to April 2011. After an eight-month hiatus, Campbell announced that a seventh issue was in the works. That issue was eventually published in August of 2012 while Campbell was living in New York City. There has been no indication whether more issues are forthcoming.

Each magazine cover featured a unique piece of interactive artwork by Campbell. The publication's design often took advantage of the multimedia nature of tablets by including touch-sensitive and video elements. Each issue's contributors were paid for their work through an honorarium to their charity of choice. Consequently, the publication raised several thousand dollars for Canadian charities far and wide. Other staff involved in the project included Jennifer Campbell, Laura Kathleen Maize and Rani Sheen.

Aggregation (ethology)

In ethology, an aggregation is any form of gathering of organisms and the process of coming together. In some forms groups of unrelated species might form, in which interaction between members of the aggregation might be minimal; for example herds of grazing zebra and antelopes might combine, both the better to observe the approach of predators, and to improve the odds of escape in the event of attack by predators. Sometimes there might be some interaction, such as mixed flocks of birds that observe each other's foraging behaviour in searching for food. Sometimes there might be quite orderly common action, such as the queuing up for a resource; for example different species of fishes may aggregate around a cleaning station where cleaner wrasse and cleaner shrimp are active, more or less taking turns for attention. Such aggregations, where there is no particular association of species or sizes, may be referred to loosely as unstructured aggregations. Commonly they are very temporary and may be loose, with flocks or herds associating casually and separating equally casually within hours.

Structured aggregations tend to be longer-term and of a specific life-cycle function and context. Typically, though not necessarily, they will be of a single species. Often they will be of a single age and possibly of a single sex, such as shoals of fish fry that have specific ecological requirements that are not compatible with those of the mature species. One class of such aggregations comprises groups of adult, but immature "bachelor" males of elephants, seals, lions and other animals in which the mature herd will not tolerate males that would begin to compete with the dominant males. Another is when aposematic larvae of certain insects such as some Lepidoptera and Hemiptera form a flock that feed together and may migrate in "processions" until they are mature after which some kinds disperse. Most species of migrating birds and mammals flock on a large scale, partly for protection and partly for greater reliability of navigation. In some species of Hemiptera the adults remain with their aggregated immature offspring, sometimes in protective roles.

The range of functions is very wide in detail, but among the more important classes of function are security against predators, success in food location, wide range of mate choice, with concomitant increase of outbreeding opportunities, location with other members of the same species (sometimes adherence to separate communities can almost amount to parapatric residence when say, different communities of rats or chimpanzees have violent mutual antipathy). There also are various forms of educational function, such as in some species where the young must learn the correct mate recognition skills, and in highly intelligent species such as crows and elephants, must learn the necessary social skills and the necessary traditional foraging techniques in their region.

Aggregation activities are not restricted to the animal kingdom; for one example, a fundamental class of aggregations occurs in the various groups of slime molds, in which separate cells actually aggregate in the process of constructing their reproductive structure.

Usage examples of "aggregation".

Manner of performing the experiments--Action of distilled water in comparison with the solutions--Carbonate of ammonia, absorbed by the roots--The vapour absorbed by the glands--Drops on the disc--Minute drops applied to separate glands--Leaves immersed in weak solutions--Minuteness of the doses which induce aggregation of the protoplasm--Nitrate of ammonia, analogous experiments with--Phosphate of ammonia, analogous experiments with--Other salts of ammonia--Summary and concluding remarks on the action of salts of ammonia.

As, however, the aggregation caused by this salt travels down the tentacles at a quicker rate than when insoluble particles are placed on the glands, it is probable that ammonia in some form is absorbed not only by the glands, but passes down the tentacles.

Against the vibrant, ultraviolet background of the nutritive culture, the aggregation of Thiobacillus glowed brilliantly from their treatment with the acridine orange stain.

He must lend himself to the development of aggregatory ideas that favour the civilising process, and he must do his best to promote the disintegration of aggregations and the effacement of aggregatory ideas, that keep men narrow and unreasonably prejudiced one against another.

Nature of the experiments--Effects of boiling water--Warm water causes rapid inflection--Water at a higher temperature does not cause immediate inflection, but does not kill the leaves, as shown by their subsequent reexpansion and by the aggregation of the protoplasm--A still higher temperature kills the leaves and coagulates the albuminous contents of the glands.

There is no direct evidence that any aggregations are in fact epideictic, but just suppose some such evidence were found.

It does not appear probable that pure water would cause much exosmose, and yet aggregation often follows from an immersion in water of between 16 hrs.

Every loose article in every heptagon had long since been stored in its individual shock-proof compartment, and now every Vorkul coiled his entire body in fierce clasp about mighty horizontal bars: for the entire kinetic energy of the untold millions of tons of mass comprising the cone, at the terrific measure of its highest possible velocity, was to be hurled upon those unbreakable linkages of force which bound the trussed aggregation of Vorkulian fortresses to the deeply-buried intrenchments of the hexans.

But if you got 3 or 5, that could not possibly be aggregation, and therefore it might be patentable invention.

While still in the north, he had been offered and had eagerly accepted an aggregation of fierce, hard-riding, hard-fighting Scots border rievers led by a justly infamous noble raider, the Laird of Eliot, overriding the inborn prejudices of the rest of his followers and officers.

I find it stated by several writers that curare has no influence on sarcode or protoplasm, and we have seen that, though curare excites some degree of inflection, it causes very little aggregation of the protoplasm.

Sel clan in Laby Youl Gather, a port Gather, the one closest to the digressive impressive essentially lunatic aggregation of structures that constituted Yasyony University and to the Government Reserve.

This process often has importance of an economic kind, for it not infrequently leads to the formation of metalliferous veins or other aggregations of ores, either in the dike itself or in the country rock.

For instance, one study has shown that depression increases platelet aggregation, which means that being depressed may make you more prone to arterial clotting and arterial aging.

The process of redissolution travels upwards from the bases of the tentacles to the glands, and therefore in a reversed direction to that of aggregation.