node

noun

1. 1.A knot, knob, protuberance or swelling.
2. 2.The point where the orbit of a planet, as viewed from the Sun, intersects the ecliptic. The ascending and descending nodes refer respectively to the points where the planet moves from South to North and N to S; their respective symbols are ☊ and ☋.
3. 3.A leaf node.
4. 4.A computer or other device attached to a network.
5. 5.The point at which the lines of a funicular machine meet from different angular directions; — called also knot.