In general, a node is a localized swelling (a "knot") or a point of intersection (a vertex).

Node may refer to:

In mathematics

  • Vertex (graph theory), a vertex in a mathematical graph
  • Vertex (geometry), a point where two or more curves, lines, or edges meet.
  • Node (autonomous system), behaviour for an ordinary differential equation near a critical point
  • Singular point of an algebraic variety, a type of singular point of a curve

In science and engineering

Spherical geometry

  • node, the points where a great circle crosses a plane of reference, or the equator of a sphere

Astronomy

  • Orbital node, the points where an orbit crosses a plane of reference
  • Lunar node, where the orbits of the Sun and Moon intersect
  • Longitude of the ascending node, how orbital nodes are parameterized

Biology

  • Lymph node, an immune system organ used to store white blood cells
  • Node of Ranvier, periodic gaps in the insulating myelin sheaths of myelinated axons
  • Sinoatrial node and atrioventricular node, specialized tissues in the heart responsible for initiating and coordinating the heartbeat
  • Primitive knot or primitive node, the organizer tissue for gastrulation in vertebrates
  • The place on a plant stem where a leaf is attached
  • In cladistics, a shared ancestor (also see Clade)

Computing and electronics

  • Node (networking), a point of connection in a communication network
  • An entity in a mesh network
  • Node (circuits), a region in an electrical circuit where there is no change in potential
  • Node (computer science), a basic unit used to build data structures
  • Goal node (computer science), a node in a graph that meets defined criteria for success or termination
  • Node (UML), the representation of a computational device in the Unified Modeling Language
  • Node.js, a JavaScript-based, cross-platform runtime environment
  • NodeB, hardware that is connected to the mobile phone network
  • NODE (wireless sensor), a wireless handheld sensor for smart devices
  • Node, a shorthand used to designate a semiconductor fabrication process

Linguistics

  • Node (linguistics), a branch point in the Tree model, or Node Theory, of language evolution

Physics

  • Node (physics), a point along a standing wave where the wave has minimal amplitude

Space-station modules

  • Unity (ISS module) or Node 1, one of the first modules of the International Space Station
  • Harmony (ISS module) or Node 2, module of the International Space Station
  • Tranquility (ISS module) or Node 3, a module of the International Space Station with the Cupola
  • Node 4, a proposed module of the International Space Station
  • Prichal (ISS module), a planned module of the International Space Station to be launched in 2021

In music

  • Node (band), Italian death metal band
  • Node (singer), Danish singer and hip hop artist of Kurdish origin
  • Node (album), a 2015 album by Australian metalcore band Northlane

Other uses

  • Node, Kentucky
  • Node tribe, a community of pastoral nomads in India and Pakistan
  • Node, a transport hub in a transportation system
  • Giordana Racing Team, a British cycling team, formerly named Node4-Giordana
  • Node Magazine, a literary project based on the novel Spook Country by William Gibson
  • New Oxford Dictionary of English, a single-volume English language dictionary, see Oxford Dictionary of English
  • Node, a cyborg with a donated human face used as a guide, in "Silence in the Library" (Doctor Who)
  • Node, the pommel-like part of a chalice where the stem meets the cup
  • A nodal organizational structure, such as in terms of business management, see Cellular organizational structure

See also

  • Nodal (disambiguation)
  • Nodule (disambiguation)

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