WAVES & WAVE PHENOMENA CELESTIAL MECHANICS ANATOMY | BOTANY

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node

1. A point of minimum displacement (zero amplitude) on a standing wave, such as the stationary points on a vibrating string. See also
   
      • WAVES AND WAVE PHENOMENA



2. Either of the points on the celestial sphere at which the plane of an orbit intersects a reference plane. The position of a node is one of the standard orbital elements used to specify the orientation of an orbit. An antinode lies 90° of orbital longitude away from its corresponding node.
   
      • CELESTIAL MECHANICS



3. In anatomy, a thickening or enlargement of an organ or tissue, such as a lymph node or the sinoatrial node in the heart.
   
      • ANATOMY AND PHYSIOLOGY



4. In botany, the position on the stem of a plant from which a leaf or leaves grow.
   
      • BOTANY



5. In analytical geometry, a point of intersection of two or more parts of a single curve.
   
      • ANALYTICAL GEOMETRY



6. In information processing and telescommunications, a junction or connection point in a network, e.g., a terminal or a computer.
   
      • COMPUTERS, ARTIFICIAL INTELLIGENCE, AND CYBERNETICS