Node

the source of lymph and lymphocytes

(botany) the small swelling that is the part of a plant stem from which one or more leaves emerge

any thickened enlargement

(computer science) any computer that is hooked up to a computer network

a connecting point at which several lines come together

any bulge or swelling of an anatomical structure or part

(astronomy) a point where an orbit crosses a plane

(physics) the point of minimum displacement in a periodic system