node

1. A knob, knot, protuberance, or swelling.
2. 1. Botany. The point on a stem where a leaf is attached or has been attached; a joint.
   2. See knot¹ (sense 7).
3. Physics. A point or region of virtually zero amplitude in a periodic system.
4. Mathematics. The point at which a continuous curve crosses itself.
5. Computer Science. A terminal in a computer network.
6. Astronomy.
   1. Either of two diametrically opposite points at which the orbit of a planet intersects the ecliptic.
   2. Either of two points at which the orbit of a satellite intersects the orbital plane of a planet.

[Middle English, lump in the flesh, from Latin nōdus, knot.]

(1) In a communications system, a node is a network junction or connection point. Every terminal, computer, hub and switch is a node.

(2) In database management, a node is an item of data that can be accessed by two or more routes.

(3) In the Document Object Model (DOM), which exposes HTML and XML content to an application or script, every element, every attribute of that element, and each piece of textual content for every attribute is considered a node. See DOM.

(4) In computer graphics, a node is an endpoint of a graphical element.

(5) In multiprocessing systems, a node can be a single processor or system. In MPP, it is one processor. In SMP, it is one computer system with two or more processors and shared memory.

The First Four Nodes of the Internet

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In Program Evaluation and Review Technique (PERT) circle in a network representing the beginning and ending of activities. A node symbolizes an event.

A swelling or protuberance.

1. In electric wiring, a junction point at which several distribution or wiring conductors come together.
2. A panel point.

A swelling or protuberance.

Pl. nodi; a small mass of tissue in the form of a swelling, knot or protuberance, either normal or pathological.

• n. of Aschoff and Tawara — atrioventricular node.
• cutaneous n. — an elevated, solid lump, without a necrotic center, about 0.5 inch diameter, caused by acute or chronic inflammation, with an unbroken surface. Called also cutaneous nodule.
• Flack's n. — see sinoatrial node.
• hemal n's — see hemal node.
• Keith's n., Keith–Flack n. — see sinoatrial node.
• lymph n. — see lymph node.
• n's of Ranvier — constrictions of myelinated nerve fibers at regular intervals of about 1 mm at which the myelin sheath is absent and theaxon is enclosed only by Schwann cell processes.
• sinoatrial (S-A) n. — see sinoatrial node.
• n. of Tawara — atrioventricular node.

(DOD) A location in a mobility system where a movement requirement is originated, processed for onward movement, or terminated.

A place on a stem where leaves or branches are attached. See also internode.

"Nodal" redirects here. For music composition software, see Nodal (software). For the human gene and corresponding protein, see NODAL.

Look up node in Wiktionary, the free dictionary.

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

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), a device attached to a computer network or other telecommunications network, such as a computer or router, 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

In science

• Biology
  • Node (botany), the place on a plant stem where a leaf is attached
  • In Cladistics, a shared ancestor (also see Clade)
• Node (physics), a spatial locus along a standing wave where the wave has minimal amplitude
• 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, 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
• In other languages, such as German, the words for some meanings of "node" and "knot" are the same.

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Dansk (Danish)
n. - knude, (zool) knæ, led, bladfæste

Nederlands (Dutch)
knooppunt, knobbel, knoest, ingewikkelde situatie, punt van minste storing (golf), punt zonder stroom/voltage (elektronica)

Français (French)
n. - (Astron, Ling, Bot, Phys, Math) n¯ud, (Méd) nodosité

Deutsch (German)
n. - Knoten, Ganglienknoten, Schwingungsknoten

Ελληνική (Greek)
n. - κόμβος, κόνδυλος, όζος (μίσχου), ρόζος, (αστρον.) δεσμός, (Η/Υ) στοιχείο δικτύου

Italiano (Italian)
nodo

Português (Portuguese)
n. - nó (m), tumor (m) (Patol.), nodo (m) (Anat.)

Русский (Russian)
узел

Español (Spanish)
n. - nodo, nudo

Svenska (Swedish)
n. - knut(a), knöl, nod

中文（简体）(Chinese (Simplified))
结, 瘤, 节, 茎节

中文（繁體）(Chinese (Traditional))
n. - 結, 瘤, 節, 莖節

한국어 (Korean)
n. - 복잡한 조직의 중심점, 매듭

日本語 (Japanese)
n. - こぶ, 節, 交点, 節点, 中核

العربيه (Arabic)
‏(الاسم) قطب, طرف, نهايه‏

עברית (Hebrew)
n. - ‮בליטה, קשר, מפרק (בצמח), חור בעטיפה השומנית של עצב, גוף קטן של רקמה שונה בגוף, למשל בלוטה, נקודה בה חוצה מסלול כוכב-לכת את מסלול השמש, נקודה של הפרעה מזערית במערכת גלים, נקודה של אפס זרם או מתח חשמלי, נקודה בה קו חוצה את עצמו, נקודת השיא של עקומה, רכיב ברשת מחשבים‬

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