Main Entry: node

Pronunciation: \ˈnōd\

Function: noun

1 a : a pathological swelling or enlargement (as of a rheumatic joint) b : a body part resembling a knot ; especially : a discrete mass of one kind of tissue enclosed in tissue of a different kind—see atrioventricular node, lymph node
2 : a point, line, or surface of a vibrating body that is free or relatively free of vibratory motion