Cluster

A cluster is a small group or bunch of something.

In science

• Cluster (physics), a small group of atoms or molecules
• Cluster chemistry, an array of bound atoms intermediate in character between a molecule and a solid
• Cluster sampling, a sampling technique used when "natural" groupings are evident in a statistical population
• Cluster analysis, a technique for statistical data analysis
• Consonant cluster, in linguistics

In astrophysics

• Star cluster, groups of stars which are gravitationally bound
• Galaxy groups and clusters, large gravitationally-bound objects
• Globular cluster, a spherical collection of stars that orbits a galactic core as a satellite
• Cluster mission, a European Space Agency mission to study the magnetosphere

In biology and health sciences

• Cancer cluster, in biomedicine, an occurrence of a greater-than-expected number of cancer cases
• Cluster headache, a neurological disease that involves an immense degree of pain
• Cluster of differentiation, protocol used for the identification and investigation of cell surface molecules present on white blood cells.
• Winter cluster, in beekeeping, a well-defined cluster of honey bees in cold temperatures
• Cluster (epidemiology), a grouping of cases of disease
• Genetic cluster, a group of genes (or proteins, or metabolites) whose expression or concentration is similar across a range of conditions

In computing

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

In music

• Tone cluster, a musical chord comprising at least three consecutive tones in a scale
• Cluster (band), a German rock band
• Cluster (album), the 1971 eponymous album by the band Cluster
• "Cluster", a track from the album Ben Bu Sarkiyi Sana Yazdim by Cem Adrian
• Cluster One, the first track on Pink Floyd's 1994 album The Division Bell

In engineering

• A bicycle cogset, either a freewheel, or cassette
• The instrument cluster of an automobile

Other

• Cluster bomb, air-dropped or ground launched shells
• Cluster diagram, general type of diagram, which represents some kind of cluster
• Clusters School of Digital Arts, an animation and visual effects training school
• Business cluster, a geographic cluster of competitive businesses
• Cluster (novels) by Piers Anthony
• Cluster home, a type of housing development
• CLUSTER Consortium Linking Universities of Science and Technology for Education and Research

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