Share this entry

Share this page

node

Syllabification: node
Pronunciation: /nōd
 
/

Definition of node in English:

noun

1A point at which lines or pathways intersect or branch; a central or connecting point.
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, intersection, interchange, fork, confluence, convergence, crossing
1.1 Computing A piece of equipment, such as a PC or peripheral, attached to a network.
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.
1.4(In generative grammar) a vertex or endpoint in a tree diagram.
Example sentences
  • Since each node represents an elementary segment (a terminal category), the nodes in a dependency tree are typically labeled by lexemes.
  • Each node carries three types of information: a syntactic function, a lexeme and a set of morphosyntactic features introduced by a part of speech category.
  • When you ‘read’ a tree, identify constituents by looking at all the elements that are exhaustively dominated by a single node in the tree.
2 Botany The part of a plant stem from which one or more leaves emerge, often forming a slight swelling or knob.
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.
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.

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day cumbersome
Pronunciation: ˈkəmbərsəm
adjective
large or heavy and therefore difficult to carry…