n.
 technical    - a point in a network at which lines intersect or branch. ▸a piece of equipment, such as a computer or peripheral, attached to a network. ▸Mathematics  a point at which a curve intersects itself. ▸Astronomy  either of the two points at which a planet's orbit intersects the plane of the ecliptic or the celestial equator. 
- Botany  the part of a plant stem from which one or more leaves emerge.
- Anatomy  a lymph node or other structure consisting of a small mass of differentiated tissue.
- Physics  & Mathematics  a point at which the amplitude of vibration in a standing wave system is zero. ▸a point of zero current or voltage. 
Derivative
  
  Etymology
  ME (denoting a knotty swelling or a protuberance): from L. nodus ‘knot’.