Definitions of node:

• noun:   (computer science) any computer that is hooked up to a computer network
• noun:   any bulge or swelling of an anatomical structure or part
• noun:   (astronomy) a point where an orbit crosses a plane
• noun:   (physics) the point of minimum displacement in a periodic system
• noun:   any thickened enlargement
• noun:   a connecting point at which several lines come together
• noun:   the source of lymph and lymphocytes