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node

Line breaks: node
Pronunciation: /nəʊd
 
/

Definition of node in English:

noun

technical
1A point in a network or diagram at which lines or pathways intersect or branch: the intersections of two or more such arteries would clearly become major nodes of traffic and urban activity
More example sentences
  • To the east is Aegidientorplatz, a major node and traffic intersection dominated by an axially placed theatre.
  • It provided near-real-time monitoring of the flow of critical classes of supply across critical nodes and lines of communication.
  • In a network the decision points are called nodes and the lines connecting nodes are called edges or paths.
Synonyms
junction, fork, branching, intersection, interchange, confluence, convergence, meeting point, crossing, criss-crossing, vertex, apex
1.1A piece of equipment, such as a computer or peripheral, attached to a network: the company’s internal worldwide area network now has some 22,000 nodes every node on the Internet
More example sentences
  • With an Ethernet interface, each cable modem appears as a node on an Ethernet LAN.
  • A plurality of computer nodes communicate using seemingly random Internet Protocol source and destination addresses.
  • Network nodes can be notebooks, handheld computers or other devices that accept MeshNetworks' communications card.
1.2 Mathematics A point at which a curve intersects itself.
Example sentences
  • The slope of the chord between two nodes is the average of the slope of the tangents at the end points.
  • We prove this result when the curves have cusps and nodes, not in a prescribed position.
1.3 Astronomy Either of the two points at which a planet’s orbit intersects the plane of the ecliptic or the celestial equator.
Example sentences
  • Lunar eclipses occur at the time of a Full Moon, and when the Moon is near one of the nodes of intersection between its orbit and the ecliptic plane.
  • This is because the nodes of the orbit of Venus pass across the Sun in early June at the descending node, and early December at the ascending node.
  • If the lunar orbit were fixed in space, such that the nodes occurred always in the same locations, then the Sun would pass through those nodes once per solar year.
2 Botany The part of a plant stem from which one or more leaves emerge, often forming a slight swelling: the stem is cut midway between nodes
More example sentences
  • For each plant, we recorded the number of leaf nodes producing flowers and the total fruit production.
  • Each shoot has several leaves arising from nodes located near its tip.
  • Both the stems and leaves, which occur in whorls at the node, are covered in hooks; these are thought to aid attachment to their support and allow the plant to climb without twining.
3 Anatomy A lymph node or other structure consisting of a small mass of differentiated tissue: infection in these nodes may lead to backache
More example sentences
  • Fixed, firm, or matted lymph nodes and nodes larger than 1.5 cm require further evaluation.
  • Some of the calcium channel blockers also exert an inhibitory effect on the sinus and atrioventricular nodes, causing the heart rate to slow.
  • Computed tomographic scan of the chest and abdomen revealed multiple enlarged nodes in the retroperitoneum, superior mediastinum, and axillae.
4 Physics & Mathematics A point at which the amplitude of vibration in a standing wave system is zero.
Example sentences
  • While in St Petersburg he made one of his most famous discoveries when he defined the simple nodes and the frequencies of oscillation of a system.
  • Here a beam selectively pushes one size of particles toward a standing light wave, which directs the particles toward its nodes.
4.1A point at which a harmonic function has the value zero, especially a point of zero electron density in an orbital.
Example sentences
  • Consider a random walk on a graph where at each time point we move from the current node to one of its neighbors.
4.2A point of zero current or voltage.
Example sentences
  • The first switch group is formed by switches, which are connected to nodes between the resistors.
  • Two measurement pads are in each case provided at the nodes between two resistors.

Origin

late Middle English (denoting a knotty swelling or a protuberance): from Latin nodus 'knot'.

Derivatives

nodal

1
adjective
Example sentences
  • In all 15 centres, or nodal areas, have been identified nationwide.
  • The Indian Coast Guard has been nominated as the nodal agency that will coordinate any work related to oil spills with the new equipment in place.
  • The railway station, which earlier handled goods trains, is now a nodal centre for passenger and express trains.

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