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node
- 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 - 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 - 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 - In botany, the position on the stem of a plant from which a leaf or leaves grow.
• BOTANY - In analytical geometry, a point of intersection of two or more parts of a single curve.
• ANALYTICAL GEOMETRY
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