A knot, knob, protuberance or swelling. • 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 ☋. • A leaf node. • A computer or other device attached to a network. • The point at which the lines of a funicular machine meet from different angular directions. • The point at which a curve crosses itself, being a double point of the curve. See crunode and acnode. • A similar point on a surface, where there is more than one tangent-plane. • A vertex or a leaf in a graph of a network, or other element in a data structure. • A hard concretion or incrustation which forms upon bones attacked with rheumatism, gout, or syphilis; sometimes also, a swelling in the neighborhood of a joint. • A point along a standing wave where the wave has minimal amplitude. • The knot, intrigue, or plot of a dramatic work. • A hole in the gnomon of a sundial, through which passes the ray of light which marks the hour of the day, the parallels of the Sun's declination, its place in the ecliptic, etc. • The word of interest in a KWIC, surrounded by left and right cotexts. • A region of an electric circuit connected only by (ideal) wires (i.e. the voltage between any two points on the same node must be zero). • A point in a parse tree that can be assigned a syntactic category label. • A point in a cladogram from which two clades branch, representing the presumed ancestor.