Chain (disambiguation)

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A chain is a series of connected links which are typically made of metal.

Chain may also refer to:

  • Necklace, a jewelry which is worn around the neck
  • Mail (armour) (or "chainmail"), a type of armor made of interlocking chain links
  • Chain tool, small mechanical device used to "break" a bicycle chain in such a way that it could be mended with the same tool
  • Chain (unit), unit of length
  • Gunter's chain, a unit of measurement
  • Catenary (or "chain"), the shape of a hanging flexible cable when supported at its ends and acted upon by a uniform gravitational force
  • Chain (real estate), whereby a group of buyers/sellers are linked together
  • Fetter (Buddhism), a deeply rooted mental attachment preventing one from achieving liberation from suffering
  • Chaining, a technique from applied behavioral analysis for teaching complicated tasks by breaking them into simpler steps
  • Chain Home and Chain Home Low, early British RDF (radar) systems of the WWII era
  • Chains (nautical), small platforms on the sides of ships


  • Chain store, retail outlets which share a brand and central management
  • Chain of command, the line of authority and responsibility along which orders are passed
  • Supply chain, coordinated system of organizations, people, activities, information and resources involved in moving a product or service from supplier to customer
  • Cold chain, temperature-controlled supply chain
  • Value chain, a management concept first described by Michael Porter


  • Chain (algebraic topology), formal linear combination of k-simplices
  • Chain complex, a generalization of the algebraic topology construct to homological algebra
  • Chain, a set paired with a total order, it usually refers to a totally ordered subset of some partially ordered set
  • Markov chain, discrete-time stochastic process with the Markov property
  • Pseudo-arc, which has at its heart the concept of a chain
  • Chain rule, a tool for differentiation in calculus
  • Conway chained arrow notation, a way of expressing exponents using arrows
  • Jordan chain, a sequence of linearly independent generalized eigenvectors of descending rank.


  • Chain reaction, sequence of reactions where a reactive product or by-product causes additional reactions
  • Ideal chain, mathematical model of polymer folding
  • Worm-like chain (or semiflexible chain), which has Kuhn length equal to twice the persistence length



  • Food chain, a hierarchical or recursive list of predators and prey


  • Chained dollars, used to express real dollar amounts adjusted over time for inflation





See also[edit]