nod-, nodu-

(Latin: knot, knob; lump)

1. For a standing wave, the region or point of maximum amplitude between adjacent nodes in a standing wave.
2. A point, or region, of maximum amplitude of a wave characteristic in a system in which the wave form is stationary in time.
A point where one branch of a curve crosses another branch.
denouement, dénouement (s) (noun); denouements, dénouements (pl)
1. The final resolution, or clarification, of the main complication of a literary or dramatic work or plot: The denouement of the movie was so ridiculous that it ruined the whole film.
2. The outcome of a complex sequence of events; the end result, or the final stage, or climax, of what has happened: While traveling home from work in his car, the unannounced construction on the street caused more dénouements of delays for Tom just before he arrived home than he had anticipated.
3. Etymology: from French dénouement, "an untying" of a plot); from dénouer, "untie"; from Old French desnouer; from des-, "un-, out"; from Latin dis- "reversal, removal" + nouer, "to tie, to knot"; from Latin nodus, "a knot".
The revealing of a plot or story.
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Telling the outcome of a story.
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1. The part of a plant stem between two nodes.
2. A section or part between two nodes; such as, a nerve or stem.
1. A rounded protuberance.
2. A rounded handle, as on a drawer or door.
3. A rounded control switch or dial.
3. A prominent rounded hill or mountain.
4. Etymology: from about 1373, knobe is thought to be from a Scandinavian or a German source. The meaning of "knoll, isolated round hill" is first recorded in about 1650; especially, in the United States.

Although knob is not a part of the nodu- family, it is used extensively to define a variety of "nodal" terms.

1. An open fabric of string or rope or wire woven together at regular intervals.
2. A trap made of netting to catch fish or birds or insects.
3. Etymology: originally "something knotted", "to twist, a knot" from Latin nodus, "knot".
Referring to a node.
nodal point
1. In optics, either of two points located on the axis of an optical system in such a way that a ray directed through one point emerges from the lens as if through the other point and in a parallel direction; if the same medium is on both sides of the lens, the nodal points coincide with the principal points.
2. In electricity, in a transmission system, the junction points by which automatic switches and switching centers are nodal points in automated systems.
3. In oceanography, points of zero displacement of water in amphidromic tidal systems, reduced from a line to a point by the Coriolis effect (observed deflection of something).

Also called, amphidromic points (points of almost zero tidal fluctuation on the ocean surface, represented on a chart of cotidal lines by a point from which these lines radiate).

nodal rhythm
A heart rhythm produced when a pacemaker has been inserted in the atrioventricular node.
nodal tissue
1. Tissue from a lymph node.
2. Tissue from the sinoatrial node or atrioventricular node in the heart.
nodal zone
The zone in which there is no tidal rise or fall in a system of standing waves, the direction of littoral (coastal or shore region) transport differing on either side of the zone.
node (NOHD)
1. A small mass of tissue in the form of a swelling, knot, knob, or protuberance, either normal or pathological.
2. A knob or nodosity; a circumscribed swelling; in anatomy, a circumscribed mass of tissue.
3. The plot of a story or drama.
4. In astronomy, either of the two points at which the intersection of the planes of two orbits; especially, those of a satellite and its primary, pierces the celestial sphere; specifically, the point where the orbit of a heavenly body intersects the ecliptic.
5. A knuckle, or a finger joint.
6. In fungi, a swelling on a stolon where the rhizomes arise.

A stolon is a shoot that bends to the ground or that grows horizontally above the ground and produces roots and shoots at the nodes.

7. Etymology: from "a knot" or "complication"; from Latin nodus, "knot". Originally borrowed around 1400 in Latin form, meaning "lump in the flesh". The meaning "point of intersection" (originally of planetary orbits with the ecliptic) was first recorded 1665.

The term node is widely used in medicine; for example, the smaller lymphatic glands are often termed "lymph nodes".

It is also applied to a collection of nerve cells forming a subsidiary nerve center found in various places in the sympathetic nervous system; such as, the sinuatrial node and the atrio-ventricular node which control the beating of the heart.

—Based on information from
Black's Medical Dictionary; Barnes & Noble Books;
Totowa, New Jersey; 1987; page 492.

The term node is generally defined as a point of juncture between parts, often forming a knot or protuberance; specific uses include:

  • Anatomy: a small knot or lump of body tissue, either existing naturally or caused by disease.
  • Botany: a joint in the stem of a plant; especially, the joint from which a leaf starts to grow.
  • Geology: a point along a fault marked by a change in the direction of apparent displacement.
  • Physics: in a standing wave system, a point or locus of points that maintains zero amplitude.
  • Astronomy: one of the two points in an orbit where the plane of the orbit intersects some reference plane.
  • Electricity: a junction point in a circuit or other network.
  • Computer Technology: a data entry point in a database management system.
  • Telecommunications: the location at which transmitting or receiving equipment is connected to a communications network.
  • Mathematics: a singular point on a curve or a vertex of a graph.
  • There is a duality principle which indicates that the edges may also be viewed as nodes; in network applications, vertices (points where three or more planes of a solid figure intersect) are called "nodes" and the edges are called "branches".

In astronomy, of or pertaining to the nodes.