#1 node n. a connecting point at which several lines come together. wn
#2 node n. [knob, thickening] any thickened enlargement. wn
#3 node n. [leaf node] (botany) the small swelling that is the part of a plant stem from which one or more leaves emerge. wn
#4 node n. (physics) the point of minimum displacement in a periodic system. wn
#5 node n. (astronomy) a point where an orbit crosses a plane. wn
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