Look up cluster in Wiktionary, the free dictionary.

A cluster is a small group or bunch of something. Wikipedia does not have an article with this exact name. ... Wiktionary is a multilingual, Web-based project to create a free content dictionary, available in over 150 languages. ...

Cluster may refer to:

• Cluster bomb, air-dropped or ground launched shells
• Cluster (band), a German musical group
• Tone cluster, in music
• Consonant cluster, in linguistics

In science: Honest John missile warhead cutaway, showing M139 Sarin bomblets (photo circa 1960) Custard munitions are air-dropped or ground launched shells that eject multiple small submunitions (bomblets). ... Cluster is a German musical group whose output prefigures ambient music. ... A tone cluster, in music and in Western tuning, is a chord or simultaneity comprised of consecutive tones separated chromatically. ... In linguistics, a consonant cluster is a group of consonants which have no intervening vowel. ...

• Cluster chemistry, an array of bound atoms intermediate in character between a molecule and a solid
• Cluster (physics), a small group of atoms or molecules
• Cluster sampling
• Data clustering, a technique for statistical data analysis

In astrophysics: In chemistry, a cluster is an array of bound atoms intermediate in character between a molecule and a solid. ... In physics, clusters are small groups of atoms or molecules. ... Cluster sampling is used when natural groupings are evident in the population. ... Data clustering is a common technique for statistical data analysis, which is used in many fields, including machine learning, data mining, pattern recognition, image analysis and bioinformatics. ...

• Star cluster, groups of stars which are gravitationally bound
• Galaxy groups and clusters, large gravitationally-bound objects
• Globular cluster
• Cluster mission, an European Space Agency mission to study the magnetosphere

In biology: Globular Cluster M92 in the Hercules constellation. ... The galaxies of HCG 87, about four hundred million light-years distant. ... The Globular Cluster M80 in the constellation Scorpius is located about 28,000 light years from the Sun and contains hundreds of thousands of stars. ... Cluster satellite FM2 The Cluster mission is an European Space Agency (ESA) unmanned space mission mission to study the Earths magnetosphere using four identical spacecraft flying in a tetrahedral formation. ...

• Cancer cluster, in biomedicine, an occurrence of a greater-than-expected number of cancer cases
• Cluster headache
• Winter cluster, in beekeeping, a well-defined cluster of honey bees in cold temperatures

In computing: Cancer cluster is a term used by epidemiologists, statisticians, and public health workers to define an occurrence of a greater-than-expected number of cancer cases within a group of people in a geographic area over a period of time1. ... Cluster headaches are rare, extremely painful and debilitating headaches that occur in groups or clusters. ... In beekeeping, a winter cluster is a well-defined cluster of honey bees that forms in a colony when the air temperature dips below 54 - 57° F (12 -14° C). ...

• Computer cluster, a group of loosely coupled computers that work together closely
• Cluster (file system), a group of disk sectors used in a File Allocation Table

In economics: Linux Cluster at Purdue University. ... In certain filesystem types like the File Allocation Table (FAT) filesystem of MS-DOS or the NTFS filesystem of Windows NT, a cluster is the unit of disk space allocation for files and directories. ...

• Business cluster, a geographic cluster of competitive businesses
• Techno cluster, a science and high tech business cluster

In education: It has been suggested that Cluster effect be merged into this article or section. ... A Techno cluster referes to a science and high tech oriented Porters cluster like the Silicon Valley or AMD chip-plants, FAB s, in Dresden, F.R. Germany, Silicon Saxony. ...

• Cluster, Consortium Linking Universities of Science and Technology for Education and Research

In science fiction:

• Cluster (novels) - novels of Piers Anthony

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