/ nəʊd; NAmE noʊd/ noun
1.
( biology ) a place on the stem of a plant from which a branch or leaf grows
2.
( biology ) a small swelling on a root or branch
3.
( technical , especially computing ) a point at which two lines or systems meet or cross :
a network node
4.
( anatomy ) a small hard mass of tissue , especially near a joint in the human body :
a lymph node
► nodal adjective
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WORD ORIGIN
late Middle English (denoting a knotty swelling or a protuberance): from Latin nodus knot.