Node

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

Node may refer to:

In mathematics

• Node (autonomous system), behaviour for an ordinary differential equation near a critical point
• Node (graph theory), a vertex in a mathematical graph
• A type of singular point of a curve.

In computing and electronics

• Node (circuits), a region in an electrical circuit where there is no change in potential
• Node (computer science), the computer representation of a node in a graph, and a basic unit used to build data structures such as linked lists and trees
• Node (networking), an active device attached to a computer network or other telecommunications network, such as a computer or a switch, or a point in a network topology at which lines intersect or branch
• Node (UML), the representation of a computational device in the Unified Modeling Language
• Node.js, a javascript-based programming framework

In science

• Biology
  • Primitive node is the organizer tissue for gastrulation in vertebrates.
  • Node (botany), the place on a plant stem where a leaf is attached
  • In Cladistics, a shared ancestor (also see Clade)
• Orbital node, the points where an orbit crosses a plane of reference (often divided into ascending and descending)
  • Lunar node, where the orbits of the sun and moon intersect
  • Longitude of the node, how orbital nodes are parameterised

Other uses

• Node (physics), a point along a standing wave where the wave has minimal amplitude
• Node, a stop in a transportation system
• Node Magazine, a literary project based on the novel Spook Country by William Gibson
• Node, a cyborg with a donated human face that is used as a guide in the universe's largest library, in "Silence in the Library" (Doctor Who)

See also

• Nodule (disambiguation)
• Nodal (disambiguation)

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