may refer to:

Science and technology

Astronomy

  • Cluster (spacecraft), constellation of four European Space Agency spacecraft
  • Cluster II (spacecraft), a European Space Agency mission to study the magnetosphere
  • Asteroid cluster, a small asteroid family
  • Galaxy cluster, the largest gravitationally bound groups of galaxies, or groups of groups of galaxies
  • Supercluster, large spherical formations in the universe, composed of many galaxy clusters
  • Star cluster
  • Globular cluster, a spherical collection of stars whose orbit is either partially or completely in the halo of the parent galaxy
  • Open cluster, a spherical collection of stars that orbits a galaxy in the galactic plane

Biology and medicine

  • 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
  • Disease cluster, a grouping of cases of disease
  • Gene cluster, a group of genes (or proteins, or metabolites) whose expression or concentration is similar across a range of conditions
  • Cluster of microorganisms, as in a colony

Chemistry

  • Cluster chemistry, an array of bound atoms intermediate in character between a molecule and a solid

Computer science

  • Computer cluster, a set of computers that work together
  • Data cluster, a group of disk sectors used in a File Allocation Table

Economics

  • Business cluster, a geographic cluster of competitive businesses
  • Cluster theory, a theory that states concentrating industries in specific regions creates several advantages

Education

  • CLUSTER, the Consortium Linking Universities of Science and Technology for Education and Research (a collection of twelve European universities which focus on science and engineering)

Equipment

  • Cluster bomb, a type of air-dropped or ground-launched shells
  • Instrument cluster of an automobile
  • A bicycle cogset, either a freewheel, or cassette
  • The set of tubes attached to a cow's teats for automatic milking

Linguistics

  • Consonant cluster, a group of consonants which have no intervening vowel
  • Language cluster or dialect cluster, a geographic distribution of languages

Math and statistics

  • Cluster analysis, a set of techniques for grouping a set of objects based on intrinsic similarities
  • Cluster sampling, a sampling technique used when "natural" groupings are evident in a statistical population
  • Cluster graph, in graph theory, a disjoint union of complete graphs
  • Clusterable graph, in balance theory
  • Cluster algebra, a class of commutative rings used in representation theory
  • Cluster expansion, a technique in statistical mechanics and quantum field theory

Physics

  • Cluster (physics), a small group of atoms or molecules

Urban development

  • Cluster home, a type of housing development
  • Research-intensive cluster, a region with a high density of research-oriented organizations
  • Urban agglomeration, a cluster concept in urban development (a human settlement with a high population density and an infrastructure of built environment)

Philosophy and religion

  • Khandha, a Buddhist concept of five material and mental factors that take part in the rise of craving and clinging
  • Proper name (philosophy), a cluster of propositions that in combination pick out a unique referent

Arts and media

Music

  • Tone cluster, a musical chord comprising at least three consecutive tones in a scale
  • Cluster (album), the 1971 eponymous album by the band Cluster
  • Cluster (band), a German electronic group
  • "Cluster", a track from the album Ben Bu Sarkiyi Sana Yazdim by Cem Adrian
  • "Cluster", a song by P-Model from the album Big Body
  • Cluster One, the first track on Pink Floyd's 1994 album The Division Bell
  • "Cluster", an extended play by the pop-punk band Waterparks

Other media

  • Cluster (novels) by Piers Anthony
  • Cluster, a poetry collection by Souvankham Thammavongsa
  • The Cluster, a character from the TV series Steven Universe

Other uses

  • Cluster, Pleasants County, West Virginia
  • Cluster diagram, general type of diagram, which represents some kind of cluster
  • Clusterfuck or cluster, slang term for a messy situation, arising in the US Marine Corps

See also

  • Clustering (disambiguation)