Node

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Node

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1. One of the two points of intersection of the orbit of a planet, planetoid, or comet with the ecliptic, or of the orbit of a satellite with the plane of the orbit of its primary. Also called nodal point. See regression of the nodes. </dd>
That point at which the body crosses to the north side of the reference plane is called the ascending node; the other, the descending node. The line connecting the nodes is called line of nodes. </dd>
2. A point, line, or surface in a standing wave where some characteristic of the wave field has essentially zero amplitude. </dd>
The appropriate modifier should be used before the word node to signify the type that is intended; e.g., displacement node, velocity node, pressure node. </dd>
3. A terminal of any branch of a network or a terminal common to two or more branches of a network. Also called junction point, branch point , or vertex. </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use