1. Relating to, characterized by, or situated at a node
   "The experiment focused on nodal points in the vibrating string"
    
2. (anatomy) pertaining to a lymph node
   "The doctor examined the nodal tissue for signs of infection"
    
3. (botany) of or relating to the point on a plant stem where leaves or branches originate
   "The gardener made cuts just above the nodal areas"
    
4. (computing, mathematics) relating to a point of intersection or convergence in a network or graph
   "The algorithm identified key nodal points in the social network"

Encyclopedia: Nodal